The upper GI tract of __________ is more complex than that of other vertebrates due to the presence of a crop.

Question

Quizplus · Accepted Answer

The presence of a crop, which is a specialized organ for holding and processing food, is a unique feature of the upper GI tract of birds. This allows them to store large amounts of food and digest it gradually, supporting their high metabolic rates and energy requirements. Sharks, amphibians, and reptiles do not possess a crop in their GI tract.

The Upper GI Tract of __________ Is More Complex Than