why we're crying when we born?

From what I understand crying opens up the lungs, and gives the baby a good initial oxegyn supply. Also, up until that point they have been cozy and comfortable in a warm, dim environment, and its a shock to come out into the cold bright world.

Crying is a form of letting people your discomfort. When we are in our mothers body everything is suppied to us. Food and oxygen to be precise. But when we are born what we first need to learn is breath on our own. And when you first learn something you feel discomfort right? That's why we cry. Well atleast thats what i think the reason is.

of cource the opening up the lungs for oxygen part --tht's the scientific ans and less funny

because we know we r coming into hell..and we r going to have to some pretty darn good karma to go to heven