AP BIOLOGY

Detailed explanation-1: -The avian stomach is divided into a proventriculus and ventriculus or gizzard. The proventriculus is a glandular stomach producing digestive enzymes similar to the stomach in dogs and cats.

Detailed explanation-2: -Turkeys Have Two Stomachs This is where food is softened and broken down. The broken down food then enters the turkey’s gizzard. The gizzard has tiny stones that turkeys typically swallow. These stones are called gastroliths and help with breaking down food for digestion because turkeys don’t have teeth.

Detailed explanation-3: -Birds have a glandular stomach, or proventriculus, and muscular stomach or gizzard. The glandular stomach receives food from the esophagus, and secretes mucus, HCl and pepsinogen, similar to what is seen in the mammalian stomach.

Detailed explanation-4: -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-5: -The digestive tract is also referred to as the gastro-intestinal or GI tract. Whichever term is used, in birds it begins at the mouth and ends at the cloaca and has several important organs in between (see the Figure 2). Beak / Mouth: Chickens, as with most birds, obtain feed with the use of their beak.