Absorption, Passive transport, Active transport, osmosis

1. ABSORPTION OF DIGESTED
PRODUCTS

2. • Absorption= The process by which the end products
of digestion pass through the intestinal mucosa into
the blood/Lymph.
• Absorption takes place in different parts of the
alimentary canal; Mouth, stomach, small intestine,
large intestine
• Maximum absorption occurs in small intestine.

3. • Absorption is carried out by;
Passive transport
Active transport

4. PASSIVE
TRANSPORT
Simple
Diffusion
Facilitated
Transport
osmosis

5. • SIMPLE DIFFUSION
Eg: GLUCOSE, AMINO ACIDS, ELECTROLYTE(Cl- ions)

7. • FACILITATED TRANSPORT
Eg: Fructose, some amino acids

8. • OSMOSIS
Transport of water depends on osmotic gradient

9. • ACTIVE TRANSPORT
Glucose, amino acids , electrolytes (Na+) absorbed into
blood

11. ABSORPTION OF FATTY ACID& GLYCEROL
 Fatty acids& glycerol can’t be absorbed into blood
 Micelle formation
 Reformation into very small protein coated fat
globules= Chylomicrons
 Which are transported into the lymph vessels(
Lacteals) in the villi
 These lymph vessels release the absorbed
substance into the blood stream.

13. MOUTH
 Certain drugs coming in contact with mucosa of mouth
are absorbed into blood capillaries.
STOMACH
 Directly absorbs certain foods including simple
sugars& alcohol
LARGE INTESTINE
 Water, some minerals(K, Na) & drugs are absorbed.

15. • ASSIMILATION
• The absorbed substance finally reach the
tissues which utilize them for their
activities.This process is called assimilation