Question
Biology Question on earthworm
Circulatory system in earthworm is
A
open type with haemoglobin in plasma
B
closed type with haemoglobin in RBC??
C
open type with haemoglobin in RBC??
D
closed type with haemoglobin in plasma
Answer
closed type with haemoglobin in plasma
Explanation
Solution
Circulatory or blood vascular system of earthworm is a closed system consisting of blood vessels and capillaries which ramify to all parts of the body. Blood is composed of a fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of the vertebrates. The red respiratory pigment, haemoglobin (or erythrocruorin) occurs dissolved in plasma. It gives a red colour to blood and aids in the transportation of oxygen for respiration.