Atrium vs. Ventricle

(architecture) A central room or space in ancient Roman homes, open to the sky in the middle; a similar space in other buildings.

(architecture) A square hall lit by daylight from above, into which rooms open at one or more levels.

(anatomy) A cavity, entrance, or passage.

Example: ‘an atrium of the infundibula of the lungs’;

(anatomy) One of two upper chambers of the heart.

(biology) Any enclosed sexine and nexine layers, widening toward the interior of the grain.

A square hall lighted from above, into which rooms open at one or more levels.

The main part of either auricle of the heart as distinct from the auricular appendix. Also, the whole articular portion of the heart.

A cavity in ascidians into which the intestine and generative ducts open, and which also receives the water from the gills. See Ascidioidea.

A cavity, entrance, or passage; as, the atrium, or atrial cavity, in the body wall of the amphioxus; an atrium of the infundibula of the lungs, etc.

any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)

the central area in a building; open to the sky

an open-roofed entrance hall or central court in an ancient Roman house.

a central hall in a modern building, typically rising through several stories and having a glazed roof.

the forecourt of a large church built on the basilican plan.

each of the two upper cavities of the heart from which blood is passed to the ventricles. The right atrium receives deoxygenated blood from the veins of the body, the left atrium oxygenated blood from the pulmonary vein.

Any small cavity within a body; a hollow part or organ, especially:

(anatomy) One of two lower chambers of the heart.

One of four cavities in the brain.

The stomach.

(archaic) The womb.

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

The stomach.

Example: ‘Whether I will or not, while I live, my heart beats, and my ventricle digests what is in it.’;

Fig.: Any cavity, or hollow place, in which any function may be conceived of as operating.

Example: ‘These [ideas] are begot on the ventricle of memory.’;

one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid

a chamber of the heart that receives blood from an atrium and pumps it to the arteries