Circulation of Blood

Q. The heart and the blood vessels of the circulatory system is derived from the

1. ectoderm
2. mesoderm
3. endoderm
4. both b and c

Q.

Atrio-ventricular septum is made of _______________ tisue:

1. Fibrous

2. Neural

3. Epithelial

4. Glandular

Q.

Which of the following is true about the circulatory system of animals?

1. Only vertebrates, annelids and cephalopods, have closed circulatory system.

2. All vertebrates have separate pulmonary and systemic circulations.

3. The circulatory system of Mammals and Birds are similar to Amphibians.

4. Animals can have only one heart or else the circulatory system would not work.