The Smooth and Cardiac Muscle ClipArt gallery offers 26 illustrations of heart, blood vessel, gastrointestinal tract, respiratory tract, and other involuntary system muscles.

The arrangement of the muscles of the auricles.

Auricles Muscles

The arrangement of the muscles of the auricles.

<em>L.A.</em>, left auricle; <em>R.A.</em>, right auricle; <em>A</em>, opening of the inferior vena cava; <em>B</em>, superior vena cava; <em>C</em>, cardiac vein of right auricle laid open; <em>D</em>, left pulmonary veins; <em>E</em>, eight pulmonary veins; <em>F</em>, muscular fibers surrounding the openings between the left auricle and left ventricle, and the right auricle and right ventricle; <em>G, H, K,</em> and <em>L</em>, muscular fibers surrounding the great veins of the heart." &mdash; Blaisedell, 1904

Muscular fibers of the auricle

L.A., left auricle; R.A., right auricle; A, opening of the inferior vena…

Cell of cardiac muscular tissue.

Cell of Cardiac Muscular Tissue

Cell of cardiac muscular tissue.

Suspensory muscle of the duodenum or muscle of Treitz.

Suspensory Muscle of the Duodenum

Suspensory muscle of the duodenum or muscle of Treitz.

The muscular arrangement of the apex of the heart.

Muscular Arrangement of the Apex of the Heart

The muscular arrangement of the apex of the heart.

"<em>The involuntary muscles</em> consist of ribbon-shaped bands which surround hollow tubes or cavities in the body. They are never attached to bony levers nor are they furnished with tendons, as are the voluntary muscles." &mdash; Blaisedell, 1904

Spindle cell of involuntary muscle

"The involuntary muscles consist of ribbon-shaped bands which surround hollow tubes or cavities…

Muscles of the larynx. Side view. Right ala of thyroid cartilage removed.

Side View of the Muscles of the Larynx

Muscles of the larynx. Side view. Right ala of thyroid cartilage removed.

Muscles of the larynx and epiglottis.

Muscles of the Larynx and Epiglottis

Muscles of the larynx and epiglottis.

Dissection of the muscles in the lateral wall of the larynx. The right ala of the thyroid cartilage has been removed.

Larynx Muscle

Dissection of the muscles in the lateral wall of the larynx. The right ala of the thyroid cartilage…

Dissection of the muscles in the posterior wall of the larynx.

Larynx Muscle

Dissection of the muscles in the posterior wall of the larynx.

Muscles of the larynx, back view.

Back View of the Muscles of the Larynx

Muscles of the larynx, back view.

Muscles of the larynx, front view. The Sternothyroid and right Thyrohyoid have been removed.

Front View of the Muscles of the Larynx

Muscles of the larynx, front view. The Sternothyroid and right Thyrohyoid have been removed.

Muscles of the larynx.

Muscles of the Larynx

Muscles of the larynx.

Isolated smooth muscle cells of the small intestine.

Smooth Muscle Cells

Isolated smooth muscle cells of the small intestine.

Anastomosing muscle fibers of the heart, seen in longitudinal section. On the right the limits of the separate cells with their nuclei are exhibited somewhat diagrammatically.

Muscle Fibers of the Heart

Anastomosing muscle fibers of the heart, seen in longitudinal section. On the right the limits of the…

The smooth muscle fibers consist of long spindle-shaped cells, the end of which are frequently spirally twisted, and in the center of which exists a long rod-shaped kernel or nucleus. Unlike striated muscle, they do not form separate muscular masses, but occur scattered, or arranged in more or less dense layers or strata, in almost all organs.

Smooth Muscle Fibers

The smooth muscle fibers consist of long spindle-shaped cells, the end of which are frequently spirally…

The muscular coat (lining) of the stomach, a type of involuntary muscle involved in the contraction of the stomach.

Muscle Lining of Stomach

The muscular coat (lining) of the stomach, a type of involuntary muscle involved in the contraction…

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.

Three sections of smooth muscle. M C is muscle cells and N is nucleus. Smooth muscles are slow to contract. They make up the wall of a bladder and blood vessels.

Smooth Muscle

Three sections of smooth muscle. M C is muscle cells and N is nucleus. Smooth muscles are slow to contract.…

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…

Cardiac muscular tissue, magnified about 400 diameters. The cell-boundaries and cell-nuclei are indicated only in the right-hand portion of the figure.

Cardiac Muscular Tissue

Cardiac muscular tissue, magnified about 400 diameters. The cell-boundaries and cell-nuclei are indicated…

Smooth muscle tissue, also known as involuntary muscle.

Smooth Muscular Tissue

Smooth muscle tissue, also known as involuntary muscle.

"Non-striped spindle-shaped cells which branch and join with one another." &mdash; Richardson, 1906

Non-Striated Muscle

"Non-striped spindle-shaped cells which branch and join with one another." — Richardson, 1906

Posterior view of the pharynx and constrictor muscles.

Constrictor Muscles of the Pharynx

Posterior view of the pharynx and constrictor muscles.

The muscles of the pharynx. On the right side most of the inferior constrictor has been removed, on the left side the Digastric and Stylohyoid have been removed.

Muscles of the Pharynx

The muscles of the pharynx. On the right side most of the inferior constrictor has been removed, on…

The muscular coat of the stomach.

Muscular Coat of the Stomach

The muscular coat of the stomach.