Which of the following is true about hearts of earthworm?
A. There are 5-7 pairs of heart.
B. They are present between 1-7th segments.
C. They are present lateral to the oesophagus.
D. They pump blood from ventral to dorsal vessel.
Which of the following is true about hearts of earthworm?
A. There are 5-7 pairs of heart.
B. They are present between 1-7th segments.
C. They are present lateral to the oesophagus.
D. They pump blood from ventral to dorsal vessel.