third ventricle
The thick, muscular walls of the ventricles squeeze inwards on the blood, increasing its pressure and pushing it out of the heart.
The top two spaces are called atria and the bottom two are called ventricles.
Cerebrospinal fluid circulates through the ventricles and the subarachnoid space.

SMART Vocabulary: related words and phrases

The circulatory system & blood
ABO
accessory pathway
adventitia
adventitial
ANA
auricle
bicuspid valve
corpuscle
femoral artery
glomus
granulocyte
haematogenous
haemic
phagocyte
portal system
precava
pulmonary artery
pulmonary vein
pulmonic
tricuspid valve

You can also find related words, phrases, and synonyms in the topics:

The brain & nervous system

ventricle | American Dictionary

ventricle
noun[ C ]
us/ˈven·trɪ·kəl/
biology
each of the two main spaces in the heart, left and right

Examples of ventricle

ventricle
No discrepancy in the ability to define anatomic structure was encountered for the body or outflow regions of the right ventricle.
For convenience of description, the right ventricle will be accounted for in terms of its three regions.
An intraventricular hemorrhage is a hemorrhage of the area surrounding the lateral cerebral ventricles.
However, surgery directed to the treatment of the failing systemic ventricle should be abandoned in favor of heart transplantation.
To our knowledge, this case report is the first description of dual right ventricles.
A discrete atrioventricular septum was seen, and there was no elongation of the outflow tract of the left ventricle.
We recently encountered two such cases, both with the segmental combination of mirror-imaged atrial arrangement, discordant atrioventricular connections, and double outlet right ventricle.
The category of univentricular connections includes double inlet ventricles, along with absence of one atrioventricular connection.
These septal areas can be absent entirely or in part in lesions such as double inlet ventricle or absence of one atrioventricular connection.
The echocardiographic diagnosis was presence of a solitary ventricle with a single atrioventricular valve and an atrial septal defect.
Perimembranous defects are found only when there are biventricular atrioventricular connections, or else when the right ventricle is dominant.
These panels show (upper) absence of the right atrioventricular connection, but with the left atrium connected to a dominant right ventricle.
An imperforate valve can be found in the setting of double inlet ventricle, or with any of the possible biventricular atrioventricular connections.
Only the left atrium is connected to a ventricle (univentricular atrioventricular connection).
The myocardium of the rudimentary right ventricle is separated by the atrioventricular groove from the muscular floor of the blind-ending right atrium.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.