Question:
Heart in fishes is described as:
Heart in fishes is described as:
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Fish heart = 2 chambers, venous, myogenic.
Updated On: Jun 20, 2026
- Neurogenic and branchial heart
- Myogenic, branchial and venous heart
- Neurogenic and venous heart
- Neurogenic and alternate heart
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The Correct Option is B
Solution and Explanation
Step 1: Understanding fish circulation.
Fishes have a single circulation system with a two-chambered heart.
Step 2: Myogenic nature.
Fish heart contractions originate within the heart muscle itself, hence it is myogenic.
Step 3: Venous heart.
Fish heart receives only deoxygenated blood, making it a venous heart.
Step 4: Branchial circulation.
Blood is pumped to gills for oxygenation, so circulation is branchial.
Step 5: Evaluating options.
Only option (2) includes all correct characteristics.
Step 6: Final conclusion.
Thus, fish heart is myogenic, venous, and branchial.
Fishes have a single circulation system with a two-chambered heart.
Step 2: Myogenic nature.
Fish heart contractions originate within the heart muscle itself, hence it is myogenic.
Step 3: Venous heart.
Fish heart receives only deoxygenated blood, making it a venous heart.
Step 4: Branchial circulation.
Blood is pumped to gills for oxygenation, so circulation is branchial.
Step 5: Evaluating options.
Only option (2) includes all correct characteristics.
Step 6: Final conclusion.
Thus, fish heart is myogenic, venous, and branchial.
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