what is atrium and ventricle and their function
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Answer:
Atrium and Ventricles are chambers of the human heart
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Atrium - The atrium is the upper chamber through which blood enters the ventricles of the heart. There are two atria in the human heart – the left atrium receives blood from the pulmonary (lung) circulation, and the right atrium receives blood from the superior vena cava (venous circulation). 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. Humans have two atria.
The atrium was formerly called the "auricle"; that term is still used to describe this chamber in some other animals, such as the Mollusca.
Ventricle - A ventricle is one of two large chambers toward the bottom of the heart that collect and expel blood received from an atrium towards the peripheral beds within the body and lungs. The atrium (an adjacent/upper heart chamber that is smaller than a ventricle) primes the pump.
In a four-chambered heart, such as that in humans, there are two ventricles that operate in a double circulatory system: the right ventricle pumps blood into the pulmonary circulation to the lungs, and the left ventricle pumps blood into the systemic circulation through the aorta.
The term "interventricular" means between the ventricles (for example the interventricular septum), while "intraventricular" means within one ventricle (for example an intraventricular block).
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