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Animal Kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnimal Kingdom2 Marks
Question
How many chambers are there in fish heart?
  1. Two
  2. Three
  3. Four
  4. One
✓

Answer

  1. Two

Explanation:

All vertebrates have a muscular chambered heart. 

Fishes have a two chambered heart with a single atrium and a ventricle. 

In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart (single circulation).

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