Digestive system in birds

UVAS

2. Presented By:
Muhammad Afaq
Presented To:
Sir Shahid Mehmood
DIGESTIVE SYSTEM

3. MOUTH
ESOPHAGUS
CROP
PROVENTRICLUS
GIZZARD
SMALL INTESTINE
CECA
LARGE INTESTINE (COLON)
CLOACA
CONTENTS

5. Through beak chicken pick up food into the mouth.
Saliva in the mouth help in the lubrication of feed and
then pushed it to the back of mouth with tongue to
be swallowed.
MOUTH

6. Esophagus is a flexible tube that connects the mouth with the
rest of digestive tract.it carries food from the mouth to the crop
and from the crop to the proventriculus.
ESOPHAGUS

7. Crop is located at the outside of body cavity in the neck region.
The swallowed feed and water are stored in the crop until they are passed to the rest of digestive tract.
In some species of poultry the crop milk is produced to fed their young
ones.(pigeon’s milk).
CROP

8. The esophagus continues past the crop connects the crop with proventriculus,
Proventriculus is also called true stomach. Chemical digestion occur here.
Digestion begins in this area .
HCl and digestive enzymes such as pepsin are added here.
PROVENTRICULUS

9. The ventriculus or gizzard is the part of digestive tract.
It is also known as false stomach .
Its help in mechanical digestion .
The gizzard have strong muscles and a layer that protects the muscle.
Consumed feed and the digestive juices from salivary glands and proventriculus pass into the gizzard
for grinding , mixing.
GIZZARD

10. The small intestine is made up of duodenum and the lower small intestine.
Nutrients are absorbed in the small intestine.
Duodenum receives digestive enzymes and bicarbonates from the pancreas and bile from the liver
juices digest proteins and bile for the digestion of lipid.
SMALL INTESTINE

11. The ceca are the blind pouches where the small and large intestine join.
Fermentation occur here.
CECA

12. The large intestine is actually smaller than the small intestine .
Absorption of water also occur in this area.
LARGE INTESTINE (COLON)

13. In the cloaca, the digestive wastes mix with wastes from the urinary system .
The reproductive system exists in this area.
CLOACA