What is the principal role of blood glands in earthworm?

Question

( A ) Produce Bloodcells and Haemoglobin
( B ) Produce White Blood Cells
( C ) Broduce Red Blood Cells
( D ) To aid digestion

Answer 1

(A) is the right answer.

Blood glands in earthworms are present on the 4th, 5th and 6th segments and produce blood cells and haemoglobin which is dissolved in blood plasma.