AP BIOLOGY

Detailed explanation-1: -The ventriculus, or gizzard, is a part of the digestive tract of birds, reptiles, earthworms, and fish. Often referred to as the mechanical stomach, the gizzard is made up of two sets of strong muscles that act as the bird’s teeth and has a thick lining that protects those muscles (see Figure 5).

Detailed explanation-2: -The chicken digestive tract is like other monogastric (single stomach) animals, such as the pig, horse, and dog, but also has its own unique differences. The most notable include the lack of teeth, crop, proventriculus, ventriculus (aka gizzard), ceca, and cloaca.

Detailed explanation-3: -The avian digestive system is found in poultry. This system differs greatly from any other type. Since poultry do not have teeth, there is no chewing. Poultry break their feed into pieces small enough to swallow by pecking with their beaks or scratching with their feet.

Detailed explanation-4: -Stomach and gizzard Also known as the proventriculus, the stomach breaks down food even further through the addition of digestive enzymes and hydrochloric acid. Hydrochloric acid’s volatile nature plays a crucial part in digestion for fowl.

Detailed explanation-5: -Chickens and other poultry are monogastric, meaning that they possess one gastric stomach, nevertheless the digestive tract of birds is uniquely specialised. Distinctive in the bird’s digestive anatomy is the crop, a digestive organ located between the mouth and ‘true’ stomach (Figure 2).