Question

A) Mention the site of exchange of material between the blood and surrounding cells
B) draw a schematic representation of transport and exchange of oxygen and carbon dioxide.

Answer 1

Hi !

(A) The site of exchange of material between the blood and surrounding cells is Alveoli of lungs.

(B) It's given below :-

Answer 2

A) The smallest vessel possesses walls that are one-cell in thickness and are known as capillaries. The exchange of substances between the blood and the surrounding cells occurs across this thin capillaries.  

B) The schematic representation of transport and exchange of carbon dioxide is given in the attachment below.