What is atrium and its function?

What is atrium and its function?

The atrium (Latin: ātrium, lit. ‘entry hall’) or auricle is the upper chamber through which blood enters the ventricles of the heart. The atria receive blood while relaxed (diastole), then contract (systole) to move blood to the ventricles. All animals with a closed circulatory system have at least one atrium.

What is an atrium in the body?

Atrium, in vertebrates and the higher invertebrates, heart chamber that receives blood into the heart and drives it into a ventricle, or chamber, for pumping blood away from the heart.

What is atrium mean in science?

Atrium. (Science: anatomy) a chamber, used in anatomical nomenclature to designate a chamber affording entrance to another structure or organ. Usually used alone to designate an atrium of the heart.

What’s another word for atrium?

In this page you can discover 21 synonyms, antonyms, idiomatic expressions, and related words for atrium, like: chamber, entrance, triple-height, cavity, glass-roofed, room, close, court, passage, courtyard and enclosure.

Is atrial the same as atrium?

Atria receive blood returning to the heart from the body and ventricles pump blood from the heart to the body. The plural form of atrium is atria or atriums.

What is the main function of left atrium?

Left atrium: one of the four chambers of the heart. The left atrium receives blood full of oxygen from the lungs and then empties the blood into the left ventricle.

What is the origin of atrium?

atrium (n.) 1570s, from Latin atrium “central court or first main room of an ancient Roman house, room which contains the hearth,” from Proto-Italic *atro-, sometimes said (on authority of Varro, “De Lingua Latina”) to be Etruscan.

What is the opposite of an atrium?

Noun. Opposite of a passage, hall or room between the outer door and the interior of a building. conclusion. exit.

Is the left or right atrium bigger?

The left atrium is one of the four chambers of the heart, located on the left posterior side. The walls of the left atrium are slightly thicker than the walls of the right atrium. Oxygen-rich blood from the lungs enters the left atrium through the pulmonary vein.