exchange surfaces and nutrient absorption

Question 1

what are exchange surfaces

Answer 1

Structures that facilitate the movement of nutrients, gases,
and wastes (e.g., villi in the intestines, alveoli in the lungs)

Question 2

function of Villi & Microvilli

Answer 2

Maximise surface area for absorption

Question 3

function of thin Capillary Walls

Answer 3

Minimise diffusion distance

Question 4

function of Mitochondria-Rich Cells

Answer 4

power active transport