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Which part of the avian digestive system acts as a replacement for teeth by mechanically grinding their food for them?

a. Crop
b. Gall bladder
c. Gizzard
d. Proventriculus

User Saranga
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Answer: c. Gizzard

Step-by-step explanation:

The Gizzard or ventriculus is the part of the digestive system of the aves, which acts as a mechanical stomach. It is composed of two sets of muscles that act as a avian teeth. It also posses the thick lining that protects those muscles. The gizzard facilitates the mechanical break down of the food as may be caused by the teeth.

User Greatwitenorth
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