Question

Explain why the blood of earthworm is less efficient oxygen carrier than that of man

Answer 1

In most insects, this "blood" does not contain oxygen-carrying molecules such as hemoglobin because their bodies are small enough for their tracheal system to suffice for supplying oxygen. ... White blood cells help to resist infections and parasites. Platelets are important in the clotting of blood.

Answer 2

Since they don't have hemoglobin