Multiple choice

How many chambers are present in a Piscean heart?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fish (Pisces) have a two-chambered heart consisting of one atrium and one ventricle. This single circulation system is less efficient than the three or four-chambered hearts of other vertebrates, but sufficient for their aquatic lifestyle where buoyancy reduces the circulatory demands of overcoming gravity. Blood passes through the heart once in each complete circuit.

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