How many chambers are there in the heart of fishes?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 2.
Fishes have a two-chambered heart. This heart consists of:
1. An atrium (or auricle) – which receives deoxygenated blood from the body.
2. A ventricle – which pumps the deoxygenated blood to the gills for oxygenation.
This simple circulatory system is typical of fish and allows for a single loop of blood circulation, where the blood flows from the heart to the gills for oxygenation and then directly to the rest of the body.