Matching digestive system functions to diagram labels

Steps:

• Identify diagram parts: Assume 1 is stomach (protein digestion site), 2 is gallbladder (fat emulsification), 3 is small intestine (absorption area), 4 is liver (bile production), 5 is pancreas (enzyme production).
• Match choice A: Links 1 to protein digestion (pepsin action) and 3 to absorbing breakdown products like peptides.
• Evaluate B: 2 emulsifies fats correctly, but 3 absorbs amino acids/glucose specifically, not general products.
• Check C and D: C mixes bile production (liver) with enzymes (pancreas); D swaps storage and production roles incorrectly.

Why A is correct:

• Stomach (1) digests proteins via pepsin into peptides; small intestine (3) absorbs these via villi, per digestive physiology.

Why the others are wrong:

• B: Absorption in 3 includes fats/vitamins too, not limited to amino acids/glucose.
• C: Liver (4) produces bile, but pancreas (5) makes enzymes; no storage overlap.
• D: Pancreas stores/releases enzymes; liver doesn't store them.

Final answer: A