Question

The cardiovascular system is made up of what two systems:

a) Circulatory system and respiratory system
b) Digestive system and Endocrine system
c) Nervous system and circulatory system
d) Muscular system and endocrine system

Answer 1

A. Circulatory system and respiratory system

Answer 2

The answer is A. because you cardiovascular is you heart system so it uses the circulatory system to circulate blood through your body and it uses the respiratory system to put oxygen into your blood stream so it will carry it through your body with the blood.

hope this helped