chicken may not need oxygen in the prior atages of development. but just before or minutes before coming out of the shell the chicken has to get oxygen from somewhere as there is none inside. where does it come from?
2006-08-08 03:16:15 · 7 answers · asked by karan tripathi 2 in Science & Mathematics ➔ Biology
The chorion. It allows gas exchange until the chick breaks away from the membrane completely, which is seconds after it breaks the shell.
2006-08-08 05:10:09 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The answers about the egg being porous to oxygen are correct, but you should note an error in your statement in that the chick DOES need oxygen in prior development. Of course in the earliest stages when the living tissue is very small, it doesn't need much oxygen, but it does need some and uses more as it grows.
2006-08-08 11:02:47 · answer #2 · answered by Eric G 2 · 0⤊ 0⤋
Isn't there a little air pouch at one end of the egg? You can see if if you break an egg that has not been boiled or see a dimple at one end of the hardboiled egg.
Perhaps the cracking of the egg occurs quick enough to get more oxygen that it needs.
I don't really know...just making a somewhat educated guess.
2006-08-08 10:35:40 · answer #3 · answered by stacey 5 · 0⤊ 0⤋
A egg has very little air holes that lets air enter the egg. Giving the chick oxygen.
2006-08-08 10:48:18 · answer #4 · answered by joelisking20005 1 · 0⤊ 0⤋
There are tiny pores in the shells of eggs to allow the unborn animal to breathe. The domestic hen's egg has around 7500 pores.
2006-08-08 10:42:19 · answer #5 · answered by kooldemand 1 · 0⤊ 0⤋
hw do think zygote get o2 in uterus its just via blood coming frm placenta
2006-08-08 11:33:32 · answer #6 · answered by chakasssss 1 · 0⤊ 0⤋
At that time, it emerges.
2006-08-08 10:32:23 · answer #7 · answered by ag_iitkgp 7 · 0⤊ 0⤋