Ventricle

[Sarah]

A cavity, or one of the cavities, of an organ, as of the larynxor the brain; specifically, the posterior chamber, or one of the twoposterior chambers, of the heart, which receives the blood from theauricle and forces it out from the heart. See Heart.

[Lanell]

either of two small, hollow spaces, one in each side of the heart, that force blood into the tubes leading from the heart to the other parts of the body

[PussyCat]

A hollow part or cavity in an organ.