NEET PG DENTAL EXAM

Detailed explanation-1: -A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart.

Detailed explanation-2: -Different types of hearts have different numbers of these chambers: two-chambered hearts have one ventricle and one atrium. three-chambered hearts have one ventricle and two atria. four-chambered hearts have two ventricles and two atria.

Detailed explanation-3: -Human beings belong to class Mammalia, they are warm blooded animals and their heart has four chambers two atrium and two ventricles, double circulation of blood takes place. Whereas fishes have two-chambered heart, amphibians and reptiles have three chambered heart.

Detailed explanation-4: -The heart is made up of four chambers. The upper two chambers are called atria (singular: atrium) and the lower two are known as ventricles (singular: ventricle). Muscular walls, called septa or septum, divide the heart into two sides.