Question

How many chambers are there in fishes heart?
1. Three
2. Eight
3. Four
4. Two

Answer 1

Correct Answer - Option 4 : Two

Option 4 is correct:

• Fishes have an only two-chambered heart with an atrium and a ventricle, and the chambers of the heart which receive the blood from body tissues are called auricles.
• Fishes respire through their gills.
• Amphibians and the reptiles (except crocodiles) have a 3-chambered heart with two atria and a single ventricle.
• Whereas crocodiles, birds and mammals possess a 4-chambered heart with two atria and two ventricles.
• Frogs respire through their skin.
• The human heart has four chambers.
• Two relatively small upper chambers called atria and two larger lower chambers called ventricles.