How many chambers are there in fish heart? (1) Two (2) Three (3) Four (4) One

Answer: (1)

The heart of the fish has two chambers namely

1. Atrium
2. Ventricle

Blood flows into the atrium after passing through the fish leaving it poorly oxygenated. The blood then gets pumped into the ventricle. The blood travels from the ventricle to the gills where it oxygenates and then circulates through the fish until the process begins again.