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A needle, used for dissection.

Needle

A needle, used for dissection.

"Nerve tissue is really made up of a great number of distinctive units called <em>nerve cells</em>. Each cell usually contains a large nucleus and gives off one or more tiny branches, or processes. Thse cells vary more in shape and size than any other cell in the body. Each nerve cell has a number of short branches, and many have also one long branch which can be traced for some distance from the cell body." — Blaisedell, 1904

Nerve Cells

"Nerve tissue is really made up of a great number of distinctive units called nerve cells.…

"The axis cylinder is in the center. On either side is seen the medullary sheath, represented by dark lines. The primitive sheath, or neurilemma, is on the outside and represented by white lines in which is a nerve corpuscle with an oval nucleus." &mdash; Blaisedell, 1904

Portion of a medullated nerve fiber

"The axis cylinder is in the center. On either side is seen the medullary sheath, represented by dark…

"The Main Nerve Trunks of the Right Forearm, showing the Accompanying Radial and Ulnar Arteries. (Anterior view.)" &mdash; Blaisedell, 1904

Nerve trunks

"The Main Nerve Trunks of the Right Forearm, showing the Accompanying Radial and Ulnar Arteries. (Anterior…

"A Great Nerve (Posterior Tibial) on the Back of the Leg, with its Accompanying Artery of the Same Name." — Blaisedell, 1904

Great Nerve

"A Great Nerve (Posterior Tibial) on the Back of the Leg, with its Accompanying Artery of the Same Name."…

"A Great Nerve (Crural) and its branches on the Front of the Thigh. The femoral artery with its cut end is shown." — Blaisedell, 1904

Great Nerve

"A Great Nerve (Crural) and its branches on the Front of the Thigh. The femoral artery with its cut…

"A Great Nerve (Plantar) and its Branches which supply the Bottom of the Feet. Note the cut tendons of the great muscles of the leg." — Blaisedell, 1904

Great Nerve

"A Great Nerve (Plantar) and its Branches which supply the Bottom of the Feet. Note the cut tendons…

"The Cervical and Thoracic Portions of the Sympathetic Nerve and their Main Branches. In the center of the figure, running almost vertically, is shown the right pneumogastrix nerve. To the left may be seen a chain of ganglia of the sympathetic nerve, running along the vertebrae. The distribution of some smaller ganglia and nerve branches in the neck and chest regions are also shown." &mdash; Blaisedell, 1904

Sympathetic nerve

"The Cervical and Thoracic Portions of the Sympathetic Nerve and their Main Branches. In the center…

"Superficial, or Cutaneous, Nerves on the Back of the Left Forearm and Hand." — Blaisedell, 1904

Superficial Nerves of the Forearm and Hand

"Superficial, or Cutaneous, Nerves on the Back of the Left Forearm and Hand." — Blaisedell, 1904

"Showing some of the superficial nerves on the left side of the neck and the head. A few superficial muscles and arteries in the same region are also shown." — Blaisedell, 1904

Superficial Nerves of the Head

"Showing some of the superficial nerves on the left side of the neck and the head. A few superficial…

"<em>A</em>, branches of the nerves of smell; <em>B</em>, nerves of touch to the nostrils; <em>E, F, G,</em> nerves to the palate springing from a ganglion at <em>C</em>; <em>H</em>, a branch of the facial nerve, from which which other branches <em>D, I,</em> and <em>J</em>, spring to be distributed to the nostrils." — Blaisedell, 1904

Nerves of the Nostril

"A, branches of the nerves of smell; B, nerves of touch to the nostrils; E, F,…

"Dental Branch of One of the Divisions of the Fifth Pair of Cranial Nerves, supplying the Lower Teeth. Branches from the motor root, distributed to various muscles, are also shown." — Blaisedell, 1904

Cranial Nerves

"Dental Branch of One of the Divisions of the Fifth Pair of Cranial Nerves, supplying the Lower Teeth.…

"Dental Branches of One of the Divisions of the Fifth Pair of Cranial Nerves, supply the Upper Teeth." — Blaisedell, 1904

Cranial Nerves

"Dental Branches of One of the Divisions of the Fifth Pair of Cranial Nerves, supply the Upper Teeth."…

"Diagram illustrating the General Arrangement of the Nervous System. (posterior view.)" — Blaisedell, 1904

Nervous System

"Diagram illustrating the General Arrangement of the Nervous System. (posterior view.)" — Blaisedell,…

"Showing a motor cell with its long, unbranched process (with two little lateral offshoots), with motor endings in striated, voluntary muscular tissue." &mdash; Blaisedell, 1904

Neuron

"Showing a motor cell with its long, unbranched process (with two little lateral offshoots), with motor…

"A nerve cell from the brain." &mdash; Ritchie, 1918

Neuron

"A nerve cell from the brain." — Ritchie, 1918

A colt's nippers at five years of age (side view)

Nippers at five years

A colt's nippers at five years of age (side view)

Side view of a colt's nippers at seven years of age.

Nippers at seven years

Side view of a colt's nippers at seven years of age.

Side view of a colt's nippers at six years of age.

Nippers at six years

Side view of a colt's nippers at six years of age.

Side view of the nippers of an old horse.

Nippers of an Old Horse

Side view of the nippers of an old horse.

A colt's lower nippers at eight years.

Lower nippers at eight years

A colt's lower nippers at eight years.

Lower nippers of a colt at five years of age.

Lower nippers at five years

Lower nippers of a colt at five years of age.

The lower nippers of a colt at four years.

Lower nippers at four years

The lower nippers of a colt at four years.

Lower nippers of a colt at six years of age.

Lower nippers at six years

Lower nippers of a colt at six years of age.

The lower nippers of a colt at three years of age.

Lower nippers at three years

The lower nippers of a colt at three years of age.

The lower nippers of a colt two years old.

Lower nippers at two years

The lower nippers of a colt two years old.

Lower nippers of an old horse.

Lower Nippers of an Old Horse

Lower nippers of an old horse.

An illustration of a human nose.

Human Nose

An illustration of a human nose.

The chief organs of the body from the side. Labels: a, arch of the aorta or main artery of the trunk; c, large intestine; d, diaphragm; e, throat; g, lung; k, kidney; l, spinal cord within the back bone; m, main artery divided to go to h legs; n, pancreas; o, gullet; s, spleen; tr, wind pipe; t, main vein of body; ap, appendix.

View of Organs from the Side

The chief organs of the body from the side. Labels: a, arch of the aorta or main artery of the trunk;…

Oshyiodes of an adult fowl.

Oshyiodes of Adult Fowl

Oshyiodes of an adult fowl.

"Shows the powerful legs, small feet, and rudimentary wings of the bird; the obliquity at which the bones of the legs and wings are placed, and the comparatively small angles which two bones make at their point of junction."&mdash;Pettigrew, 1857

Skeleton of Ostrich

"Shows the powerful legs, small feet, and rudimentary wings of the bird; the obliquity at which the…

"Surface of Palm of the Hand, showing Openings of Sweat Glands and Grooves between Papillae of the Skin. In the smaller figure the same epidermal surface is shown as seen with the naked eye." &mdash; Blaisedell, 1904

Surface of the palm

"Surface of Palm of the Hand, showing Openings of Sweat Glands and Grooves between Papillae of the Skin.…

"The pancreas, partly cut away, so as to show the duct, which collects the pancreatic juice, and empties it into the duodenum." &mdash; Tracy, 1888

Pancreas

"The pancreas, partly cut away, so as to show the duct, which collects the pancreatic juice, and empties…

<i>Sipunculus nudus</i>. A species of unsegmented marine worm, commonly called the peanut worm. "A, One fourth natural size, in longitudinal section. T, tentacles; r,r,r,r, four retractor muscles of the proboscis, detached from the points r1, r1 in the body walls; a, anus; ae, esophagus; i, intestine with j1, j2 its loops; x, y, appendages of rectum; z, fusiform mscle; w, ciliated groove of intestine; q, anal muscles; s, caecal glands of t, caeca, the so-called testes; p, pore at end of body; n, nervous cord, ending in a lobed ganglionic mass near the mouth, with an enlargement, g1, posteriorly; m1, m2, muscles associated with the nervous cord." &mdash;Whitney, 1889

Peanut Worm - Interior Anatomy of Adult

Sipunculus nudus. A species of unsegmented marine worm, commonly called the peanut worm. "A, One fourth…

External features of a perch.

Perch

External features of a perch.

digestive, excretory, and reproductive systems of a perch.

Perch

digestive, excretory, and reproductive systems of a perch.

Circulatory system of a perch.

Perch

Circulatory system of a perch.

The skeleton of a perch.

Skeleton of Perch

The skeleton of a perch.

Internal anatomy of a pigeon.

Pigeon

Internal anatomy of a pigeon.

"The Pigeon flying downwards and turning prior to alighting. The pigeon expands its tail both in ascending and descending."&mdash;Pettigrew, 1874

The Pigeon

"The Pigeon flying downwards and turning prior to alighting. The pigeon expands its tail both in ascending…

"The outer ear consists of a plate of gristle, shaped somewhat like a shell, known as the pinna, or auricle, and of a tube about an inch long, called the auditory canal." &mdash; Blaisedell, 1904

Pinna

"The outer ear consists of a plate of gristle, shaped somewhat like a shell, known as the pinna, or…

"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…

the internal anatomy of a rabbit.

Rabbit

the internal anatomy of a rabbit.

Cross section of abdomen of a rabbit.

Rabbit

Cross section of abdomen of a rabbit.

"When a bone is broken, blood trickles out between the injured parts, and afterwards gives place to a sticky, watery fluid, which gradually becomes thicker, like a syrup or jelly. This is slowly replaced by a new bone structure and forms a kind of cement to gold together the broken ends." — Blaisedell, 1904

Broken Radius

"When a bone is broken, blood trickles out between the injured parts, and afterwards gives place to…

Left thigh-muscle of a rail.

Rail Thigh

Left thigh-muscle of a rail.

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

Rattlesnake

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

"Showing the attachment of the recti, or straight muscles to the eyeball, also the distribution of arteries upon the outer coat of the eye." &mdash; Blaisedell, 1904

Attachment of the recti

"Showing the attachment of the recti, or straight muscles to the eyeball, also the distribution of arteries…

"Illustrating the path of a simple nervous reflex action." — Blaisedell, 1904

Reflex Action

"Illustrating the path of a simple nervous reflex action." — Blaisedell, 1904

An illustrative view of the dissection of he renal organs of a chiton. "F, foot; L, Edge of the mantle not removed in the front part of the specimen; s.o., Oesophagus; af, anus; gg, Genital duct; go, External opening of the same; eg, Stem of the nephridium leading to no, its external aperture; nk, reflected portion of the nephridial stem; ng, Fine caeca of the nephridium, which are seen ramifying transversely over the whole inner surface of the pedal muscular mass." -Britannica, 1910

Dissection of the Renal Organs of a Chiton

An illustrative view of the dissection of he renal organs of a chiton. "F, foot; L, Edge of the mantle…

"Larynx, trachea, and bronchi, showing the manner of division, and the rings of cartilage." &mdash; Tracy, 1888

Respiratory system

"Larynx, trachea, and bronchi, showing the manner of division, and the rings of cartilage." —…

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the corners of the lower jaw; and the other pair is found in front of and below the ears." &mdash; Ritchie, 1918

Salivary glands

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the…

The salmon is well known both from its commercial importance and from its remarkable migrations up rivers to spawn.

Salmon

The salmon is well known both from its commercial importance and from its remarkable migrations up rivers…

Scales of fishes; cycloid scale (Pike).

Fish Scales

Scales of fishes; cycloid scale (Pike).

Scales of fishes; Ctenoid scale (Perch)

Fish Scales

Scales of fishes; Ctenoid scale (Perch)

Scales of fishes; Placoid scale (Thornback)

Fish Scales

Scales of fishes; Placoid scale (Thornback)

Scales of fishes; Ganoid Scale (Palaeoniscus)

Fish Scales

Scales of fishes; Ganoid Scale (Palaeoniscus)

A scalpel.

Scalpel

A scalpel.

"The <em>shoulder-blade</em> is a large, flat, three-sided bone, which is placed on the upper and back part of the chest. On the outer side it has a saucerlike cavity on which the rounded head of the arm bone rests." &mdash; Blaisedell, 1904

Scapula

"The shoulder-blade is a large, flat, three-sided bone, which is placed on the upper and back…

An illustration of the dorsal view of the scapula of a rabbit. "A, acromion; m, metacromion; g, glenoid fossa; c, coracoid process; v, vertebral border; s, spine." -Century, 1889

Dorsal View of the Scapula of a Rabbit

An illustration of the dorsal view of the scapula of a rabbit. "A, acromion; m, metacromion; g, glenoid…