State one role of each of the following in human digestive system : (i) Hydrochloric acid (ii) Villi (iii)…
State one role of each of the following in human digestive system :
(i) Hydrochloric acid
(ii) Villi
(iii) Anal Sphincter
(iv) Lipase
Solution
Role of:
(i) Hydrochloric acid: Creates an acidic medium for facilitating the action of enzyme / kills microorganisms.
(ii) Villi: Increases the surface area for absorption of digested food.
(iii) Anal Sphincter: Exit of waste material from anus is regulated.
(iv) Lipase: Breakdown / digestion of emulsified fats or lipids