Question

Number of chambers in human heart is:

• A. 4
• B. 2
• C. 6
• D. 8

Hint:

Remember: Mammalian hearts, including humans, have four chambers for effective separation of oxygenated and deoxygenated blood.

Answer 1

The Correct Option is A

The human heart is a muscular organ composed of
four chambers: two upper chambers called
atria (left atrium and right atrium) and two lower chambers called
ventricles (left ventricle and right ventricle). 1.
Structure and Function of the Chambers:

The
right atrium receives deoxygenated blood from the body through large veins called the superior and inferior vena cava.
This blood then flows into the
right ventricle, which pumps it to the lungs via the pulmonary artery for oxygenation.
Oxygen-rich blood from the lungs returns to the
left atrium through the pulmonary veins.
The
left ventricle receives this oxygenated blood and pumps it through the aorta to the entire body.
2.
Importance of Four Chambers:

Having separate atria and ventricles on both sides allows the heart to act as a
double pump — one pump (right side) sends blood to the lungs, while the other pump (left side) circulates blood to the rest of the body.
This separation ensures that oxygenated and deoxygenated blood do not mix, allowing efficient oxygen transport.
The thick muscular walls of the left ventricle enable it to generate the high pressure required to deliver blood throughout the body.
3.
Overall Significance:

The four-chambered structure supports the high metabolic demands of humans by ensuring continuous and efficient circulation of blood.
This design is a key adaptation for warm-blooded animals to maintain their body temperature and metabolic activity.
In summary, the four-chambered heart structure — two atria and two ventricles — plays a crucial role in maintaining separate pulmonary and systemic circulation, enabling efficient oxygenation and delivery of blood throughout the body.