Air sacs of birds

What is the use of air sacs in birds?

What is the importance of pneumatic bones and air sacs in birds?

Write down the role of air sacs in birds.

[A] : In elastic lungs of birds are supplemented by remarkable system of air sacs . [R] : Air sacs function in storage of food .

[A] : In elastic lungs of birds are supplemented by remarkable system of air sacs . [R] : Air sacs function in storage of food .

[A] : In elastic lungs of birds are supplemented by remarkable system of air sacs . [R] : Air sacs function in storage of food .

[A] : In elastic lungs of birds are supplemented by remarkable system of air sacs . [R] : Air sacs function in storage of food .

Number of air sacs of pigeons are "_______"

Prepare a list of roles air sacs of pigeon play to fly in the air.

Prepare a list of roles air sacs of pigeon play to fly in the air.