Digestion and absorption

[Rahat Mobeen]

Digestion start from mouth/beak, Crop moist the feed, in gizzard musculars digetion, Proventriculus gladular digetion takes place, in intestine fat digestion and absorption.

[Md. Ayub Ali]

• Mouth: Digestion starts here.
• Esophagus (Gullet): Transports feed from mouth to the stomach.
• Crop: A pouch in the esophagus used to store food primarily & temporarily before moving it on to the stomach.
• Stomach (Proventriculus/Gizzard): Principally the organ where food is broken into smaller units. It has two parts: the proventriculus for storage and the gizzard. The gizzard is a muscular part of the stomach that uses grit to grind grains and fiber into smaller particles.
• Small Intestine: Aids in digestion and nutrient absorption. Composed of the duodenum, jejunum and ileum.
• Liver: The largest glandular organ in the body. Aids in the metabolism of carbohydrates, fats and proteins.
• Ceca: Bacterial action in the ceca helps break down undigested food passing through the intestine. The ceca turns into the large intestine, which connects with the cloaca.
• Large Intestine: Functions primarily to absorb water, dry out indigestible foods and eliminate waste products.
• Cloaca: Where the digestive, urinary and reproductive systems meet.
• Urinary System: Consists of two kidneys and two ureters. The kidneys are located in the pelvic bones. They filter waste from the blood and pass it through the ureter to the outside via the cloaca/vent.
• Vent: The external opening of the cloaca that passes waste to the outside.

[Dr. Muhammad Ikram Sarwar]

Birds absorb and digest Nutrients from the Feed through Small intestine. Digestion take place by action of enzymes and absorption through Small intestine walls.

[Chukwuemeka Christian Akoma]

Digestion start from the mouth where you have the beak to the crop, etc

[Dr. Muhammad Ikram Sarwar]

Yes exactly

[D Kannathasan]

Avian digestion system

[Saviour Uyinosa]

Ceca: From the small intestine, indigestible fibers and other materials move into the ceca, where they are fermented by beneficial bacteria, allowing the bird to extract additional nutrients.

Large Intestine: Finally, the remaining waste passes through the large intestine and is expelled from the bird’s body.

[Saviour Uyinosa]

Mouth: The food is initially broken down by the bird’s beak before being swallowed.<div>Crop: The food then moves to the crop, which is an expandable sac in the throat where the food is stored and softened through the addition of saliva.</div><div>Proventriculus: From the crop, the food then travels to the proventriculus, which is the glandular stomach. Here, enzymes and acids are secreted to start breaking down the food further.</div><div>Gizzard: The food next enters the gizzard, which is a muscular organ that contains small stones or grit. These stones help grind down the food, aiding in further digestion.</div><div>Small Intestine: The partially digested food moves into the small intestine, where bile is released from the liver to emulsify fats and pancreatic enzymes further break down proteins, carbohydrates, and fats.</div>

[Saviour Uyinosa]

Birds digest and absorb nutrients from their feed through a specialized process that involves several organs in their digestive system. When a bird consumes food, it goes through the following stages:

[Dr. Muhammad Ikram Sarwar]

Okay

[Amir Sohel]

Birds digest food by breaking it down into smaller pieces, absorbing nutrients in the small intestine, and reabsorbing water in the large intestine

[Mohamed Ismail]

Thanks

[Md. Osman Sheikh]

Feed is swiftly processed in the gizzard and ground before being stored in the crop. Digestive enzymes further break down food in the proventriculus. Nutrients are absorbed in the small intestine.

[Hamza Muhammad]

The food slurry then ends up in the gizzard. The gizzard consists of a thick muscle wall that slides past each other. By means of sliding and using grit, food is ground (<1mm) so that the nutrients can be absorbed in the intestines. Grit can be classified into insoluble (stomach grit) and soluble.

[Jeffery Escobar]

Briefly, the digestive process in birds starts at the feed mill, where particle size reduction, mixing, and pelleting takes place. Often enzymes are added to the diet of birds to increase the efficiency of the digestive process. Feed is stored in the crop where some feed hydration occurs as well as some microbial growth can take place. Some activity of the salivary amylase can occur in the crop as well. The proventriculus secretes hydrochloric acid and pepsin to initiate enzymatic digestion. The gizzard is a large muscular unit to reduce particle size, because chickens don’t have teeth or mastication. In the small intestine enzyme secreted by the pancreas and the brush border will continue with the enzymatic digestion. The pancreas also secretes sodium bicarbonate to neutralize the acidity of the digesta from the proventriculus/gizzard and the liver secretes bile acids for fat emulsification and microbiota control. Most nutrient absorption happens in the small intestine. The function of the ceca and large intestine is microbial fermentation and water absorption.

[Dr. Muhammad Ikram Sarwar]

Thanks 👍

[Adel Halbouni]

Thank you for the detailed explanation! It’s interesting how each part of the digestive system plays a crucial role in nutrient absorption and efficiency. The role of the gizzard in compensating for the lack of teeth is particularly fascinating. Do different bird species have variations in this process, or is it relatively consistent across poultry ?

[Dr. Muhammad Ikram Sarwar]

Consistent across all Poultry Birds

[Bello Bashir Bello]

Thank you

[Toyin Ogunsola]

Digestion starts from the mouth by using beak to pick their feed down to the oesophagus to proventriculus, gizzards,small intestine and then large intestine.

[Dr. Muhammad Ikram Sarwar]

Indeed