Multiple choice

The three-chambered heart of frog is not as efficient as the human heart with four chambers, because

  1. the muscles of the heart are not strong

  2. both oxygenated and deoxygenated blood mix in the ventricle

  3. the ventricle cannot pump blood properly

  4. it cannot hold enough quantity of blood
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The three-chambered frog heart has one ventricle where oxygenated blood from the lungs and deoxygenated blood from the body partially mix, reducing oxygen delivery efficiency. The mixing occurs because there's no complete septum separating the ventricle. This is the key disadvantage compared to the four-chambered human heart which keeps oxygenated and deoxygenated blood completely separate.

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