The document summarizes the key components and functions of the digestive system in chickens. It describes the mouth, esophagus, crop, proventriculus, gizzard, small intestine, ceca, large intestine, and cloaca. It provides details on how food moves through each part and the roles they play in mechanical and chemical digestion before the waste is excreted through the cloaca.

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