Question

The word "air cell" in a sentence.

I have many more words to do this with so if you can help me on this one.
For every one I'm going add five points to each question.
Thanks

Answer 1

The size of the air cell is commonly taken as a guide to the age of the egg.

Answer 2

An air cell in an egg provides a chick with air when it is ready to start breathing on its own and hatch from an egg.