Absorption_Grade11 PRESENTATION.pdf it is coverd in term 3

thalks more abaut absorbtion of digested food

1. ABSORPTION -
GRADE 11
Understanding the process of nutrient absorption in the
human body

2. INTRODUCTION
•Absorption is the process by which digested food
molecules pass into the blood or lymph.
•Quick Check (MCQ):
•Which organ is primarily responsible for absorption?
•A) Stomach
•B) Small Intestine
•C) Large Intestine
•D) Liver

3. WHAT IS ABSORPTION?
•Absorption is the process of moving digested nutrients
from the gut into the bloodstream.
•It occurs mainly in the small intestine.
•Nutrients absorbed include glucose, amino acids, fatty
acids, vitamins, and minerals.

4. STRUCTURES ADAPTED
FOR ABSORPTION
•- Villi: finger-like
projections increasing
surface area.
•- Microvilli: smaller
projections on villi for more
absorption.
•- Thin epithelial layer for
easy diffusion.
•- Rich blood supply to
carry absorbed nutrients.

5. ABSORPTION OF
NUTRIENTS
•- Glucose and amino acids: absorbed into blood
capillaries.
•- Fatty acids and glycerol: absorbed into lacteals
(lymph vessels).
•- Vitamins and minerals: absorbed directly into blood.

6. IMPORTANCE
OF ABSORPTION
•-Provides energy to
body cells.
•-Supplies raw
materials for growth
and repair.
•-Supports body
functions such as
immunity and
metabolism.
•-Prevents nutrient
deficiencies.

7. CLASS ACTIVITY

8. CONCLUSION
•Absorption ensures
that digested food
molecules enter the
body’s cells.
•Most absorption
takes place in the
small intestine due
to villi and microvilli.
•Key Point: Without
absorption,
digestion would be
useless.