Answer:
The correct match would be:
- Closed circulatory system - b) earthworm
- Two-chambered heart - a) fish
- Four-chambered heart - c) birds
The closed circulatory system refers to the blood circulating system in which blood always remain closed within the blood vessels of different sizes and wall thickness. Blood is pumped with the help of pumping organ termed heart.
All vertebrates and few invertebrates such as squids and earthworm have closed circulatory system.
The circulatory system of the fish consists of the two-chambered heart and associated blood vessels. The heart contains only one atrium and one ventricle. Atrium receives blood from all parts of the body and ventricle pumps the blood for gill circulation.
Birds and humans have four chambered heart that is, it consists of two atria and two ventricles. It enables the double circulation of the blood and prevent the mixing of oxygenated and deoxygenated blood. It complements the warm blooded lifestyle of birds and mammals.