Villus absorption: lacteals handle fats

Steps:

• Villi in the small intestine feature blood capillaries and a central lacteal vessel for nutrient uptake.
• Vessel X is the lacteal, a lymph vessel in the villus core.
• Digestion products like amino acids and glucose enter blood capillaries via active transport.
• Fatty acids and glycerol form micelles, get reformed into chylomicrons, and enter lacteals for lymphatic transport.

Why C is correct:

• Lacteals specifically absorb fatty acids and glycerol (as monoglycerides) to form chylomicrons, per intestinal absorption physiology.

Why the others are wrong:

• A: Amino acids and glucose are absorbed into blood capillaries, not lacteals.
• B: Glucose enters blood; only fatty acids go to lacteals.
• D: Glycerol enters lacteals, but amino acids go to blood.

Final answer: C