The word "air cell" in a sentence.
i have many more words to do this with so if you can me on this one.
for every one i'm going add five points to each question.

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.

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

hi     (had to add 20 words)                                                                  

eurasia because it is europe and asia