Avian Digestion

What is the role of the gizzard?

• grinds food

• stores and softens food

• secretes protein enzymes for digestion

Answer explanation

The gizzard is the second part of the birds stomach, it's specialised constructed of thick, muscular walls to grind food often aided by grit/small stones consumed.

Tags

NGSS.MS-LS1-7

What is the role of the crop?

• stores and softens food

• assists in the production of eggs

• grinds food

Answer explanation

It comes after the esophagus. It's an enlarged muscular pouch near the throat acting as food storage. Not all avian species have one. Some examples- poultry, parrots, raptors do, owls don't.

Birds store food in an organ called a

• stomach

• shell

• crop

The air sac is to respiration as the crop is to

• oxygen

• digestion

• excretion

• birds

Match the animal with the correct digestive system.

Avian

• Cow

• Horse

• Chicken

• Pig

What is the primary function of the proventriculus in avian digestion?

• Secretes digestive enzymes

• Grinds food

• Absorbs nutrients

• Stores food

Which part of the avian digestive system is responsible for grinding food?

• Crop

• Gizzard

• Proventriculus

• Intestine

In birds, where is food temporarily stored before digestion?

• Gizzard

• Crop

• Proventriculus

• Intestine

What is the role of the cloaca in birds?

• Absorbs nutrients

• Stores food

• Excretes waste

• Grinds food

Which of the following is a unique feature of avian digestion compared to mammals?

• Presence of a gizzard

• Presence of a stomach

• Presence of a liver

• Presence of intestines

Tags

NGSS.MS-LS4-2