Lipid Absorption via Lacteals

Steps:

• Lipids are digested into monoglycerides and fatty acids in the small intestine lumen.
• These form micelles that facilitate absorption across the enterocyte membrane.
• Inside enterocytes, lipids reassemble into chylomicrons.
• Chylomicrons enter lacteals for lymphatic transport to the bloodstream.

Why A is correct:

• Lacteals are blind-ended lymphatic capillaries in villi that absorb and transport lipid-laden chylomicrons, bypassing portal vein for direct systemic delivery.

Why the others are wrong:

• B: Blood capillaries absorb water-soluble nutrients like amino acids and glucose, not lipids.
• C: Microvilli increase surface area for absorption but do not transport lipids systemically.
• D: Central lacteal is the specific site, while muscularis aids peristalsis, not absorption.

Final answer: A