Why is the part labelled 5 thicker than 6?
A.
5 is the left ventricle and 6 the right ventricle
B.
6 is the left ventricle and 5 the right ventricle
C.
5 receives blood from the left auricle and 6 from the right
D.
5 pumps blood round the body and 6 pumps blood into the lungs
E.
5 deals with oxygenated blood and 6 deals with deoxygenated blood
Correct answer is D
No explanation has been provided for this answer.