7th of September 2015

hey guys

I have doubt

we need oxygen to live

but when a bird is in an egg how does it breathe

Sivaa Bala - CBSE - Class VI

Monday, September 07, 2015 at 18:08:PM


Hi Sivaa,

Bird and reptile eggs have a hard shell. Under the shell are two membranes. Between the membranes is a small air cell, also called an air sack, filled with oxygen.As the animal develops it uses this oxygen,

Monday, September 07, 2015 at 18:15:PM