Gizzard vs. Proventriculus

Gizzardnoun

A specialized organ constructed of thick muscular walls found in the digestive tract of some animals, including archosaurs, birds, earthworms, some gastropods, some fish, and some crustaceans used for grinding up food, often aided by particles of stone or grit.

Proventriculusnoun

The part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes

Gizzardnoun

The second, or true, muscular stomach of birds, in which the food is crushed and ground, after being softened in the glandular stomach (crop), or lower part of the esophagus; the gigerium.

Proventriculusnoun

A similar part of the digestive system of invertebrates (e.g. insects)

Gizzardnoun

A thick muscular stomach found in many invertebrate animals.

Proventriculus

The proventriculus is part of the digestive system of birds. An analogous organ exists in invertebrates and insects.

Gizzardnoun

thick-walled muscular pouch below the crop in many birds and reptiles for grinding food

Gizzard

The gizzard, also referred to as the ventriculus, gastric mill, and gigerium, is an organ found in the digestive tract of some animals, including archosaurs (pterosaurs, crocodiles, alligators, dinosaurs, birds), earthworms, some gastropods, some fish, and some crustaceans. This specialized stomach constructed of thick muscular walls is used for grinding up food, often aided by particles of stone or grit.