Page 35 - E-Biology Sec.2 2024-2025 U1_Handy
P. 35

Mechanism of absorption of the digested food by villi:

Water, salts, monosacc.,      Villus                  Fatty acids, glycerol &
 a.a, soluble vitamins.                              water insoluble vitamins
                          By active transport /
  Blood route             membranal diffusion              (A,D,E & K).

                              Lymphatic route

Blood capillaries in                                           Lacteal vessels
        villus                                               Lymphatic system

Hepatic portal vein                                                 slowly
        Liver                                               Superior vena cava

    Hepatic vein                                                     Heart
Inferior vena cava
                                                     In the epithelial cells of villi,
        Heart                                        some fatty acids + glycerol

                                                               recombine.
                                                     Epithelial cells absorb some

                                                         emulsified fats aren't
                                                        hydrolyzed directly by

                                                              engulfment.

                          Fats made by S. intestine

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First Term
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