Question

The heart is the organ that pumps blood to the whole body. It has different chambers through which blood passes before being pumped throughout the body. How many chambers does the heart have?
A. $2$
B. $3$
C. $4$
D. $5$

Answer 1

Hint: Heart is the muscular organ that weighs around $300$ grams. It is located in the thoracic cavity ringed by a sheath called pericardium in the middle of lungs and the main purpose of the heart is in pumping blood through the arteries, veins and capillary. The valves of heart are present in two pairs which ensures that the blood flows in only one direction. Human Circulatory system has atria and ventricles.

Complete step-by-step answer:
Heart is the supreme muscular pumping organ which helps in pumping of the oxygenated blood all around the body and deoxygenated blood to lungs. The wall of the human heart has three layers Endocardium which is the inmost layer it avoids the aberrant blood clotting. Myocardium is the middlemost later which helps in pumping. Epicardium is the outermost layer that shelters the walls of the heart.

The uppermost chamber of heart contains left and right atrium and are light weighted and are distinct by interatrial septum. Atrium collects blood from the body or from the lungs. Left atrium collects oxygenated blood from the lungs and therefore flows to right ventricles through the bicuspid valve. Atria also helps in the construction of hormones responsible for the up hold of blood pressure. Right atrium collects the blood from veins. The inferior and superior vena cava brings the blood from lower as well as upper body and therefore flows to the right ventricle through the tricuspid valve.
The lower chamber of the heart has left and right ventricles which are broad walled and are distinct by interventricular septum. Ventricles help in the blood pumping to lungs or the body. The right ventricle collects the blood from the right atrium and flows it to the lungs through the pulmonary artery. The left ventricle flows the blood rich in oxygen content to the body and hence is one of the strong chambers.

Therefore the correct answer is C.

Note: Heart is a two sided pump organ. It removes the waste products from the body and helps in the flowing of blood to different organs. The direction of blood flow is guarded by the valves which helps in the one way blood flowing. There are four valves which are situated in between the heart chambers.