The diagram shows the exchange of oxygen and carbon dioxide through a capillary wall.

What two systems are represented in this diagram?

a) Endocrine and circulatory
b) Circulatory and digestive.
c) Circulatory and respiratory
d) Respiratory and endocrine,

The diagram shows the exchange of oxygen and carbon dioxide through a capillary wall What two systems are represented in this diagram a Endocrine and circulator class=