Page 49 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

DRAWING DIAGRAMS - PARTS - PROCEDURE

PERISTALTIC MOVEMENT OF BOLUS Peristalsis

1. Oesophagus is a long tube upper end connects to

pharynx and lower end connects to stomach.
2. It is muscular and elastic.
3. When the food enters into oesophagus, the muscles present in

its wall contract and relax alternately.
4. Due to this wave like movements are producing.

5. These wave like movements are called Peristaltic movements.
This process is called peristalsis.
6. These movements help in pushing the food down into the

stomach.

VILLI Villi

1. Finger like projections present in the inner How to draw
pl. scan QR
walls of the small intestine are called Villi.
2. Blood vessels and Lymph vessels are present to form

a network in villi.

3. They absorb the digested food into the blood.
4. Due to the presence of villi surface of the small intestine

increase.

5. It helps rapid absorptiion of digestive food materials.
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