What are the special structures of the avian digestive tube and their

1.	What are the special structures of the avian digestive tube and their respective functions?
Answer» The digestive tube of birds has special structures, in this sequential order: the crop, the proventriculus and the gizzard. The crop has the function of temporary storage of ingested food and it is a more dilated area of the avian esophagus. The proventriculus is the chemical stomach of the birds where food is mixed with digestive enzymes. Thegizzard is a muscular pouch that serves as a mechanical stomach where the food is ground to increase the exposure area of the food particles for the digestive enzymes to act.

What are the special structures of the avian digestive tube and their respective functions?

Answer»

The digestive tube of birds has special structures, in this sequential order: the crop, the proventriculus and the gizzard.

The crop has the function of temporary storage of ingested food and it is a more dilated area of the avian esophagus. The proventriculus is the chemical stomach of the birds where food is mixed with digestive enzymes. Thegizzard is a muscular pouch that serves as a mechanical stomach where the food is ground to increase the exposure area of the food particles for the digestive enzymes to act.

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