Question

How many chambers are there in the heart of a human.
A. Two
B. Three
C. Four
D. Five

Answer 1

Hint: Heart is the important organ of human beings; it coordinates the functions of the entire body by pumping the oxygenated or purified blood to all different organs. The heart is the centre for the purification of blood, it helps in purifying the deoxygenated blood from left and right ventricles and atria through the valves present within the heart chambers.

Complete answer:
Two: The two-chambered heart is seen in fishes, where one chamber receives blood from systematic circulation and another chamber receives blood from lungs and the dishes system function is complemented by the two-chambered but the human body cannot be supported by the two chambers.
Hence, option A is not correct.
Three: The three-chambered heart is seen in amphibians, where both the two upper chambers of heart help in blood purification whereas the other chamber consists of both oxygenated and deoxygenated blood hence it is considered as the incomplete heart. So, option B is not correct.
Four: The four-chambered heart is seen in humans. It is differentiated into right, left atrium and right, left ventricles. The deoxygenated blood passes from the right atrium to the right ventricle and passes to lungs whereas the oxygenated blood from the lungs enters into the heart and passes on to the different organs. Hence, option C is correct.
Five: For the human body to function appropriately a complete and proper four-chambered heart is essential. So, option D is not correct.

Hence, the correct answer is option (C).

Note: It is important to note that the blood circulation in the heart can be observed as the oxygen-rich blood enters the heart from lungs and moves to different body parts whereas the oxygen-poor blood enters the heart from the body and goes out to lungs.