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A diagram of the heart of a fish. Labels: 1, Pericardium. 2, The ventricle that receives the blood from the body. 3, The ventricle that sends the blood to the gills.

A Diagram of the Heart of a Fish

A diagram of the heart of a fish. Labels: 1, Pericardium. 2, The ventricle that receives the blood from…

The heart of a frog (Rana esculenta) from the front. Labels: V, ventricle, Ad, right auricle; As, left auricle; B, bulbus arteriosus, dividing into right and left aorta.

Heart of a Frog

The heart of a frog (Rana esculenta) from the front. Labels: V, ventricle, Ad, right auricle; As, left…

A diagram of the heart of a reptile. Labels: 1, Pericardium. 2, Single ventricle. 3, Left auricle. 4, Right auricle. The arrows show the direction of the blood flow.

A Diagram of the Heart of a Reptile

A diagram of the heart of a reptile. Labels: 1, Pericardium. 2, Single ventricle. 3, Left auricle. 4,…

An illustration of a heart with an arrow.

Heart with Arrow

An illustration of a heart with an arrow.

The left auricle and ventricle laid open, the posterior walls of both being removed.

Heart with Left Auricle and Ventricle Laid Open

The left auricle and ventricle laid open, the posterior walls of both being removed.

The right auricle and ventricle laid open, the anterior walls of both being removed.

Heart with Right Auricle and Ventricle Laid Open

The right auricle and ventricle laid open, the anterior walls of both being removed.

Base of ventricles exposed by removal of the auricles.

Heart with Ventricles Exposed

Base of ventricles exposed by removal of the auricles.

A diagram of the heart. Labels: 1, Right and left auricle. 2, Right and left ventricle. 3, 4, The pericardium. 5, 6, Large blood vessels (arteries).

A Diagram of the Heart

A diagram of the heart. Labels: 1, Right and left auricle. 2, Right and left ventricle. 3, 4, The pericardium.…

A diagram of the heart. Labels: 1, Right auricle. 2, Right ventricle. 9, Left auricle. 10, Left ventricle. 17, Tricuspid valves. 19, Mitral valves.

A Diagram of the Heart

A diagram of the heart. Labels: 1, Right auricle. 2, Right ventricle. 9, Left auricle. 10, Left ventricle.…

A complex anatomical view of the heart. RA is the right atrium, or auricle, which receives the deoxygenated blood by way of two superior vena cava (SVC) and one inferior vena cava (IVC). The blood passes through the right ventricle (RV) and is pumped up to the lungs via the pulmonary arteries (PA). At the lungs, the blood is reoxygenated and returns via the pulmonary vein (PV) and left atrium/auricle (LA). From there, the blood is passed to the left ventricle (LV) where the blood is pumped up through the systematic arch (SA) to the body. The systematic arch gives off a right innominate artery (INN), where the blood is then passed to the right and left carotid (C) and subclavian (SCL), where the blood goes to the head and arms respectively. It continues dorsally to the dorsal aorta (DA), which is the main artery that distributes blood to the whole body. TR is the windpipe, or trachea, BR is the bronchial tube that carries air to the lungs, and BV is a blood vessel on the wall of the heart.

Anatomy of Heart

A complex anatomical view of the heart. RA is the right atrium, or auricle, which receives the deoxygenated…

Anterior view of the heart, dissected, after long boiling to show the superficial muscular fibers. The aorta (b') and pulmonary artery (a') have been cut short close to the semilunar valves. Labels: a, right ventricle; b, left ventricle; c, c, groove between ventricles; d, d', right auricle (atrium); e, e', left auricle (atrium); f, superior vena cava; g', g", right and left pulmonary veins. The fibers are seen running a circular, oblique, transverse, and longitudinal direction.

Anterior View of the Heart

Anterior view of the heart, dissected, after long boiling to show the superficial muscular fibers. The…

An anterior view of the heart in a vertical position with its vessels injected.

Anterior View of the Heart

An anterior view of the heart in a vertical position with its vessels injected.

"<em>A</em>, superior vena cava; <em>B</em>, right auricle; <em>C</em>, right ventricle; <em>D</em> left ventricle; <em>E</em>, left auricle; <em>F</em> pulminary vein; <em>H</em>, pulminary artery; <em>K</em> aorta; <em>L</em>, right subclavian artery; <em>N</em>, left common carotid artery." &mdash; Blaisedell, 1904

Anterior view of the heart

"A, superior vena cava; B, right auricle; C, right ventricle; D…

The cavities of the right auricle and right ventricle of the heart.

Auricle and Ventricle of the Heart

The cavities of the right auricle and right ventricle of the heart.

Back vertical view of the heart with its injected veins.

Back Vertical View of the Heart

Back vertical view of the heart with its injected veins.

"Diagram of the rush of blood when the heart beats. The valves v open above are closed below while the valves s closed above are open below." &mdash;Davison, 1910

Beating heart

"Diagram of the rush of blood when the heart beats. The valves v open above are closed below while the…

Cavities of the right side of the heart, with their valves.

Cavities of the Right Side of the Heart

Cavities of the right side of the heart, with their valves.

"<em>A, B</em>, right pulmonary veins, <em>S</em>, openings of the left pulmonary veins; <em>E, D, C, aortic valves; <em>R</em>, aorta, <em>P</em>pulmonary artery, <em>O</em>, pulmonic valves, <em>H</em>, mitraal valve; <em>K</em>, columnae carneae, <em>M</em> right ventricular cavity." &mdash; Blaisedell, 1904

Cavities of the heart

"A, B, right pulmonary veins, S, openings of the left pulmonary veins; E, D, C,…

The chambers of the heart. Labels: A, right ventricle; B, left ventricle; C, right auricle; D, left auricle; E, tricuspid valve; F, bicuspid valve; G, semilunar valves; H, valves of the aorta; I , inferior vena cava: K, superior vena cava; L, pulmonary veins.

Chambers of the Heart

The chambers of the heart. Labels: A, right ventricle; B, left ventricle; C, right auricle; D, left…

A diagram of the circulation through the heart.

Circulation Through the Heart

A diagram of the circulation through the heart.

Diagram showing the compartments of the heart. The smaller compartments are the auricles (also known as atria) and the larger compartments are the ventricles. The middle part of the figure represents the heart with its two sides; <em>a</em> being the right auricle, <em>b</em> the right ventricle, <em>d</em> the left auricle, and <em>e</em> the left ventricle. The blood is received in the right auricle, <em>a</em>, from the general system, <em>f</em>. It then passes into the right ventricle, <em>b</em>, and is forced by the contraction of it through arteries to the lungs, <em>c</em>. From the lungs it comes back to the heart, to the left side, and enters the left auricle, <em>d</em>. From this it passes into the left ventricle, <em>e</em>, from which it is sent all over the body, represented by <em>f</em>.

Heart, Compartments of

Diagram showing the compartments of the heart. The smaller compartments are the auricles (also known…

The right auricle and ventricle opened, and a part of their right and anterior walls removed, so as to show their interior. Labels: 1, superior vena cava; 2, inferior vena cava; 2', heptic veins cut short; 3, right auricle; 3', placed in the fossa ovalis, below which is the Eustachian valve; 3", is placed close to the aperture of the coronary adjacent walls of the auricle and ventricle has been preserved; 4, cavity of the right carnea or musculus papillaris; 5, 5', 5", tricuspid valve; 6, placed in the interior of the pulmonary artery, a part of the anterior wall of that vessel having been removed, and a narrow portion of it preserved at its commencement, where the semilunar valves are attached; 7, concavity of the aortic arch close to the cord of the ductus arteriosus; 8, ascending part or sinus of the arch covered at its commencement by the auricular arteries; 10, appendix of the left auricle; 11, the outside of the left ventricle, the lower figure near the apex.

A Diagram of the Heart

The right auricle and ventricle opened, and a part of their right and anterior walls removed, so as…

The left auricle and ventricle opened and a part of their anterior and left walls removed. The pulmonary artery has been divided at its commencement; the opening into the left ventricle is carried a short distance into the aorta between two of the segments of the semilunar valves; and the left part of the auricle with its appendix has been removed. The right auricle is out of view. Labels: 1, the two right pulmonary veins cut short; their opening are seen within the auricle; 1' , placed within the cavity of the auricle on the left side of the septum and on the right side and on the part which forms the remains of the valve of the foramen ovale, of which the crescentic fold is seen towards the left hand of 1'; 2, a narrow portion of the wall of the auricle and ventricle preserved round the auriculo-ventricular orifice; 3, 3', the cut surface of the walls of the ventricle, seen to become very much thinner towards 3", at the apex; 4, a small part of the anterior wall of the left ventricle which has been preserved with the principle anterior columna carnea or musculus papillaris attached to it; 5. ,musculi papillares; 5', the left side of the septum, between the two ventricles, within the cavity of the left ventricle; and above the three segments of its semilunar valve which are hanging loosely together; 7', the exterior of the great aortic sinus; 8, the root of the pulmonary artery and its semilunar valves; 8' the separated portion of the pulmonary artery remaining attached to the aorta by 9, the cord of the ductus arteriosus; 10, the arteries rising from the summit of the aortic arch.

A Diagram of the Heart

The left auricle and ventricle opened and a part of their anterior and left walls removed. The pulmonary…

Diagram to illustrate the action of the heart. Labels: aur, auricle (atrium); vent. ventricle; v, veins; a, aorta; m, mitral valve; s, semilunar valves. In A, auricle is seen contracting, ventricle dilated, mitral valve open, semilunar valves closed. In B, auricle is seen dilated, ventricle contracting, mitral valve closed, semilunar valves open.

Diagram of the Action of the Heart

Diagram to illustrate the action of the heart. Labels: aur, auricle (atrium); vent. ventricle; v, veins;…

"Diagram of the passages of the heart. 1. left auricle. 2. left ventricle, 3. Right auricle. 4. Right ventricle." &mdash;Brown, 1884

Diagram of the heart

"Diagram of the passages of the heart. 1. left auricle. 2. left ventricle, 3. Right auricle. 4. Right…

Front vertical view of the heart with its injected veins.

Front Vertical View of the Heart

Front vertical view of the heart with its injected veins.

A representation of the heart as it really appears showing the front view. At <em>a</em> is the right auricle that receives blood from all pats of the body by two large veins h and i. At <em>b</em> is the right ventricle, which receives the blood from the auricle and sends it to the lungs by the pulmonary artery <em>f</em>. At <em>c</em> is the left auricle, which receives the blood from the lungs by the pulmonary veins <em>g, g, g</em>. At <em>d</em> is the left ventricle which receives blood from the auricle and forces it all over the body through the aorta <em>e</em>.

Heart, Front View of

A representation of the heart as it really appears showing the front view. At a is the right…

Front view of the heart.

Front View of the Heart

Front view of the heart.

Diagram of the interior of the heart. Labels: A, aorta; PA, pulmonary artery; VCI and VCS, vena cava inferior and vena cava superior; T, tricuspid, and M, mitral valve. The other letters same as in preceding figure.

Interior of the Heart

Diagram of the interior of the heart. Labels: A, aorta; PA, pulmonary artery; VCI and VCS, vena cava…

Left side of heart. Labels: 1, cavity of left auricle (atrium); 3, opening of right pulmonary veins; 5, left pulmonary veins; 5, left pulmonary veins; 6, auriculo-ventricular opening; 8, wall of left ventricle; 9, cavity of left ventricle; a, mitral valve (its flaps are attached by the chordae tendineae to the muscular pillars (b,b); d, arch of aorta); e, pulmonary artery.

Left Side of Heart

Left side of heart. Labels: 1, cavity of left auricle (atrium); 3, opening of right pulmonary veins;…

Left side of the heart, showing the left auricle (atrium) and left ventricle).

Left Side of the Heart

Left side of the heart, showing the left auricle (atrium) and left ventricle).

Position of the heart. The pericardium laid open.

Position of the Heart

Position of the heart. The pericardium laid open.

A posterior view of the heart in a vertical position and with its vessels injected.

Posterior View of the Heart

A posterior view of the heart in a vertical position and with its vessels injected.

Right side of heart. Labels: A, cavity of right ventricle; B, superior vena cava; C, inferior vena cava; a, wall of right ventricle; b, c, columnae carneae; d, pulmonary vein; e, f, tricuspid valve; m, semilunar valve; o, wall of left ventricle; p, q, v, ascending aorta, arch and descending aorta.

Right Side of Heart

Right side of heart. Labels: A, cavity of right ventricle; B, superior vena cava; C, inferior vena cava;…

Right side of the heart, showing the right auricle (atrium) and right ventricle).

Right Side of the Heart

Right side of the heart, showing the right auricle (atrium) and right ventricle).

Section of heart at level of valves. Labels: P, pulmonary artery, with flaps of semilunar valve open; A, aorta, with flaps of semilunar valve open; M, closed mitral valve; T, closed tricuspid valve.

Section of Heart Showing Valves

Section of heart at level of valves. Labels: P, pulmonary artery, with flaps of semilunar valve open;…

The heart. Labels: RA, right auricle, RV; right ventricle; LA, left auricle; LV, left ventricle.

The Heart

The heart. Labels: RA, right auricle, RV; right ventricle; LA, left auricle; LV, left ventricle.

The bases of the ventricle of the heart, showing the auriculoventricular, aortic, and pulmonary orifices and their valves.

Ventricle of the Heart

The bases of the ventricle of the heart, showing the auriculoventricular, aortic, and pulmonary orifices…

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

Wheel Hub

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

"<em>A</em>, a fold of peritoneum; <em>B</em>, lacteals and lymphatic glands; <em>C</em>, veins of intestines; <em>R.C.,</em>, receptacle of the chyle (receptaculum chyli); <em>P.V.</em>, portal vein; <em>H.V.</em>, hepatic veins; <em>S.V.C.</em>, superior vena cava; <em>R.A.</em>, right auricle of the heart; <em>I.V.C.</em>, inferior vena cava." &mdash; Blaisedell, 1904

Intestinal absorption

"A, a fold of peritoneum; B, lacteals and lymphatic glands; C, veins of intestines;…

A heart shaped leaf with a sharp apex.

Cordate Leaf

A heart shaped leaf with a sharp apex.

A cordate leaf has the base rounded in the shape of a heart.

Cordate Leaf

A cordate leaf has the base rounded in the shape of a heart.

"<em>L.A.</em>, left ventricle; <em>B</em>, right ventricle; <em>F</em>, pulmonary artery; <em>G</em>, aorta; <em>H</em>, arch of the aorta; <em>K</em>, innominate artery; <em>L</em>, right common carotid artery; <em>M</em>, right subclavian artery; <em>N</em>, thyroid cartilage forming upper portions of the larynx; <em>O</em>, trachea." &mdash; Blaisedell, 1904

Lungs

"L.A., left ventricle; B, right ventricle; F, pulmonary artery; G,…

"<em>A</em>, division of left bronchus to upper lobe; <em>B</em>, left branch of the pulmonary artery; <em>C</em>, left bronchus; <em>D</em>, left superior pulmonary vein; <em>E</em>, left inferior pulmonary vein; <em>F</em>, left auricle; <em>K</em>, inferior vena cava; <em>L</em>; division of the right bronchus to lower lobe; <em>M</em>, right inferior pulmonary vein; <em>N</em>, right superior pulmonary vein, <em>O</em>, right branch of the pulmonary artery; <em>P</em>, division of right bronchus to upper lobe; <em>R</em>, left ventricle; <em>S</em>, right ventricle." &mdash; Blaisedell, 1904

Lungs

"A, division of left bronchus to upper lobe; B, left branch of the pulmonary artery;…

"Relative Postion of the Lungs, the Heart, and Some of the Great Vessels belonging to the latter. <em>A</em>, left common carotid artery; <em>B</em>, external carotid artery; <em>C</em>, internal carotid artery; <em>D</em>, left jugular vein; <em>E</em>, sterno-cleido muscle; <em>F</em>, right innominate artery with branches to head and arm; <em>G</em>, left subclavian artery; <em>H</em>, great azygos vein; <em>K</em>, thoracic duct." &mdash; Blaisedell, 1904

Lungs

"Relative Postion of the Lungs, the Heart, and Some of the Great Vessels belonging to the latter. A,…

"The Lungs. 1, Summit of lungs. 2, Base of lungs. 3, Trachea. 4, Right bronchus. 5, Left bronchus. 6, Left aurical of heart. 7, Left superior pulmonary vein. 8, Right superior pulmonary vein. 9, Left ventricle of heart. 10, Right ventricle of heart." -Foster, 1921

Lungs

"The Lungs. 1, Summit of lungs. 2, Base of lungs. 3, Trachea. 4, Right bronchus. 5, Left bronchus. 6,…

Anterior view of the lungs and heart. Labels: 1, heart; 2, inferior vena cava; 3, superior vena cava; 4, right innominate vein; 5, left innominate vein; 6, jugular vein; 7, subclavian vein; 8, arch of aorta; 8', subclavian artery; 9, left pulmonary artery; 9', 9', carotid artery; 10, trachea; 11, left bronchus; 12, ramifications of right bronchus exposed in upper lobe of right lung; 13, 14, middle lobe; 15, lower lobe; 16, upper lobe of left lung; 17, lower lobe of left lung.

Anterior View of the Lungs and Heart

Anterior view of the lungs and heart. Labels: 1, heart; 2, inferior vena cava; 3, superior vena cava;…

"The lymph vessels of the body. rc, the thoracic duct; lac, the lacteals taking the lymph and fatty part of food from the intestines." —Davison, 1910

Lymph Vessels

"The lymph vessels of the body. rc, the thoracic duct; lac, the lacteals taking the lymph and fatty…

"Anatomy of an Acephalous Mollusc (Mactra): s, stomach; ii, intestine; ag, anterior ganglions; pg, posterior ganglions; mn, muscles; a, anus; h, heart; l, liver; f, foot; sh, shell; ma, mantle; b, branchiae; t, tentacula; r, oral, or respiratory syphon; t, anal syphon." &mdash; Chambers, 1881

Mollusc Anatomy

"Anatomy of an Acephalous Mollusc (Mactra): s, stomach; ii, intestine; ag, anterior ganglions; pg, posterior…

The muscular fibres of the heart, unlike those of most involuntary muscles, are striated.

Heart Muscle

The muscular fibres of the heart, unlike those of most involuntary muscles, are striated.

Muscular fiber cells from the heart. The fibers which lie side by side are united at frequent intervals by short branches.

Muscular Fiber Cells from the Heart

Muscular fiber cells from the heart. The fibers which lie side by side are united at frequent intervals…

"Anatomy of the Oyster. A. Hinge or anterior umbonal end of the left valve of an adult oyster, upon which the soft parts of the animal are represented as they lie in situ, but with the greater part of the mantle of the right side removed. a u. The auricle of the right side of the heart contracted. B. Posterior or ventral end of the left valve, which in life is usually directed upward more or less, and during the act of feeding and respiration is separated slightly from the margin of its fellow of the opposite side to admit the water for respiration, and which also contains the animal's food in suspension. b m. Body-mass, traversed superficially by the generative ducts g e. b j. The organ of Bojanus, or 'renal' organ, of the right side of the oyster. (The ducts which it sends into the manle are not shown, nor is its connection with the genito-urinary sinus s indicated.)" &mdash; Winston's Encyclopedia, 1919

Oyster

"Anatomy of the Oyster. A. Hinge or anterior umbonal end of the left valve of an adult oyster, upon…

Geometric pattern for translation and rotation exercises.

Geometric Block Pattern 37

Geometric pattern for translation and rotation exercises.

The pericardium is a conical serofibrous sac in which the hear and the commencement of the great vessels are contained. Show are the ligaments of the pericardium. Right lateral view, showing the right vertebropericardial ligaments, the right phrenopericardial, and the superior and inferior sternopericardial ligaments.

Pericardium Ligaments

The pericardium is a conical serofibrous sac in which the hear and the commencement of the great vessels…

"Showing its distribution by its branches and ganglia to the larynx, pharynx, heart, lungs, and other parts." — Blaisedell, 1904

Trunk of the Pneumogastric Nerve

"Showing its distribution by its branches and ganglia to the larynx, pharynx, heart, lungs, and other…

"I long to lay this aching head and wounded heart beneath the soil, To slumber in that dreamless bed from all my toil." -Trowbridge, 1866

Poetic Rebus

"I long to lay this aching head and wounded heart beneath the soil, To slumber in that dreamless bed…

The flat, heart shaped body which results from the development of a spore of a fern.

Prothallus (under side)

The flat, heart shaped body which results from the development of a spore of a fern.

The pulmonary artery. Labels: t, The trachea. h, The heart. a, The aorta. p, The pulmonary artery. 1, The branch of pulmonary artery that divides in the left lung. 2, The branch that divides in the right lung.

The Pulmonary Artery

The pulmonary artery. Labels: t, The trachea. h, The heart. a, The aorta. p, The pulmonary artery. 1,…

A diagram of pulmonary circulation. Labels: 1, Descending vena cava. 2, Ascending cava vein. 3, Chamber of right side of heart. 4, Chamber of left side of heart. 5, Aorta. 6, Arch of aorta. 7, Pulmonary artery. 8, Its left branch. 9, Its right branch. 10, Right pulmonary vein. 11, Left pulmonary vein.

A Diagram of Pulmonary Circulation

A diagram of pulmonary circulation. Labels: 1, Descending vena cava. 2, Ascending cava vein. 3, Chamber…

A portion of the pulmonic circulation. 1, A branch of the artery that carries the impure blood to the lungs. 3, Capillary vessels. 2, A vein through which red blood is returned to the left side of the heart.

A Portion of the Pulmonic Circulation

A portion of the pulmonic circulation. 1, A branch of the artery that carries the impure blood to the…