Question

How many chambers are there in a frog's heart?

• A. 2
• B. 3
• C. 4
• D. 1

Hint:

The frog's heart has three chambers: two atria and one ventricle. This is different from mammals, which have a four-chambered heart, but still provides effective circulation in amphibians.

Answer 1

The Correct Option is B

The frog's heart has three chambers: two atria and one ventricle. In comparison to mammals that have a four-chambered heart, the frog's three-chambered heart helps in the circulation of blood in a less efficient but still effective manner for their physiological needs.

The three chambers are:

1. Left Atrium: Receives oxygenated blood from the lungs.
2. Right Atrium: Receives deoxygenated blood from the body.
3. Ventricle: Pumps mixed blood (oxygenated and deoxygenated) to both the lungs and the rest of the body.

The circulatory system in frogs is not as efficient as that of mammals, as the oxygenated and deoxygenated blood mix in the ventricle. However, the three-chambered heart is sufficient for their requirements, particularly in their amphibious environment.

Thus, the correct answer is (B) 3 chambers.