Question

As shown in Figure 27–3, the ventricle in a single-loop circulatory system is responsible for

A)receiving blood from the body.
B)pumping blood out to the gills.
C)pumping blood out to the body.
D)receiving blood from the gills.

Answer 1

C)pumping blood out to the body

Answer 2

The circulatory system of the fish is a single-loop. The heart of the fish is two-chambered, consisting of only one ventricle and one atrium. The atrium of the fish collects the blood which has come from around its body, while the ventricle pumps this collected blood to the gills. The blood goes to the gills where it is reoxygenated as the gas-exchange occurs.

Hence, the answer is 'option B - pumping blood out to the gills'.