third ventricle (redirected from third ventricles)

third ventricle

n.

A narrow, vertically oriented cavity in the midplane below the corpus callosum that communicates with each of the lateral ventricles through the interventricular foramen.

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third ventricle

Etymology: Gk, triotus, below second rank; L, ventriculus, little belly

a cavity of the brain bounded on each side by a thalamus and the hypothalamus. It communicates anteriorly with the lateral ventricles and posteriorly with the aqueduct of the midbrain.

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ventricle

a small cavity or chamber, as in the brain or heart.

Ventricular system of the brain. By permission from Aspinall V, O'Reilly M, Introduction to Veterinary Anatomy and Physiology, Butterworth Heinemann, 2004

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cardiac ventricle

the single fetal cardiac ventricle, formed by the looping of the bulboventricle; divided later by the growth of the interventricular septum as a projection from the wall of the bulboventricle.

fifth ventricle

the median cleft between the two laminae of the brain's septum lucidum.

fourth ventricle

a median, horizontally disposed, rhomboid cavity in the hindbrain, between the cerebellum and medulla, containing cerebrospinal fluid.

gastric ventricle

stomach.

laryngeal ventricle

a variably developed cavity of the larynx that opens into the laryngeal vestibule by a cleft between the vestibular and vocal folds; well developed in dogs and horses and especially certain apes.

lateral ventricle

the cavity in each cerebral hemisphere, derived from the cavity of the embryonic tube, containing cerebrospinal fluid and communicating with the third ventricle.

left ventricle

the lower chamber of the left side of the heart, which pumps oxygenated blood out through the aorta to all the tissues of the body.

pineal ventricle

an extension of the third ventricle into the stalk of the pineal body.

right ventricle

the lower chamber of the right side of the heart, which pumps venous blood through the pulmonary trunk and arteries to the capillaries of the lung.

third ventricle

a vertically disposed, ring-shaped space that contains cerebrospinal fluid and that communicates anteriorly with the lateral ventricles and caudally with the cerebral aqueduct within the diencephalon between the two thalami.