The diagram shows the human alimentary canal. Which labelled part absorbs the most water?
▶️ Answer/Explanation
Ans: C
The large intestine (C) is the primary site for water absorption in the alimentary canal. While the small intestine absorbs nutrients, most remaining water is reabsorbed in the colon to form solid feces.
Other parts (A, B, D) are involved in digestion or transport but do not play a major role in water absorption. Thus, the correct answer is C.
The diagram shows part of the small intestine and an associated blood vessel.
What is represented by the arrow?
A) absorption of sugars
B) assimilation of sugars
C) digestion of sugars
D) ingestion of sugars
▶️ Answer/Explanation
Ans: A
The arrow in the diagram represents the movement of nutrients from the small intestine into the bloodstream. This process is known as absorption (A), where digested food molecules (such as sugars) pass through the intestinal wall into the blood.
Assimilation (B) refers to the utilization of absorbed nutrients by cells, digestion (C) is the breakdown of food, and ingestion (D) is the intake of food. Since the diagram depicts the transfer of nutrients into the blood, the correct answer is A (absorption of sugars).