Site of Fatty Acid Absorption

Site of absorption of fatty acid in ruminants as well as non-ruminant is-

Correct Answer: Proximal jejunum

Fatty acids are absorbed from the proximal jejunum of the small intestine in both ruminants and non-ruminants.

Digestion & Absorption Summary Table

• Carbohydrates:
  • Ruminants: End product = VFAs → absorbed through ruminal wall by passive diffusion
  • Non-ruminants: End product = Glucose → absorbed in small intestine by active transport
• Proteins:
  • Both: End product = Amino acids
  • Ruminants: Absorbed in Ileum | Non-ruminants: Absorbed in Duodenum & Jejunum
• Fats (Fatty acids):
  • Both ruminants and non-ruminants: Absorbed in Proximal Jejunum

Fat Absorption Mechanism

• Bile salts emulsify fats → pancreatic lipase hydrolyzes triglycerides → fatty acids + monoglycerides form micelles → absorbed into enterocytes → reassembled into chylomicrons → enter lymphatics (lacteals) → thoracic duct → blood
• Horse and pseudo-ruminants (no gall bladder) → bile secreted continuously