AP BIOLOGY

Detailed explanation-1: -The food trickles from the crop into the bird’s stomach (proventriculus or gizzard) where digestive enzymes are added to the mix and physical grinding of the food occurs. The gizzard is why chickens do not need teeth.

Detailed explanation-2: -Birds have crops for storing food and gizzard as they lack teeth.

Detailed explanation-3: -The alimentary canal of a bird has a muscular gizzard. It is used for crushing and churning food. Some birds store pebbles or stones in the gizzard to effectively churn seeds and nuts. The crop is located in front of the bird’s neck above the sternum.

Detailed explanation-4: -gizzard, in many birds, the hind part of the stomach, especially modified for grinding food. Located between the saclike crop and the intestine, the gizzard has a thick muscular wall and may contain small stones, or gastroliths, that function in the mechanical breakdown of seeds and other foods.

Detailed explanation-5: -Chicken gizzards are cut from the digestive tract of a chicken. Similar to a stomach, the gizzard is used to grind up the foods the bird eats. Chicken gizzards are a popular food throughout the world. You can find them sold as street food in Haiti and Southeast Asia and in soup in Mexico.