or why do we yawn at all? and why can is be contagious too?
2006-09-09 16:01:53 · 5 answers · asked by Gothic Girl 4 in Health ➔ Other - Health
You yawn when you are tired, because of a lack of oxygen to the brain. Yawning gets O2 to the brain very quickly.
2006-09-09 16:08:31 · answer #1 · answered by tiger 2 · 0⤊ 0⤋
OMG i really don't know why we yawn whe we're tired! i know i swear it can be contagious too lol cuz one person yawns and so on and so on lol so yep sorry i don't really know. a teacher once told me we yawn to get oxygen or something i have no idea i should have payed more attention in class lol
2006-09-15 00:21:23 · answer #2 · answered by I Luv Joel Madden!! 6 · 0⤊ 0⤋
yawning is just an essential that we do to stretch out those neck and shoulder muscles.....
actually I don't know why we yawn, but I feel more relaxed after I yawn, and somehow sleepy, maybe it does have somethign to do with it, I don't know... sorry, wish I was smarter medically... *tears*
2006-09-13 15:32:13 · answer #3 · answered by ♥Ashlyn♥ 2 · 0⤊ 0⤋
Atelectasis. Yawning expands the alveoli in your lungs and increases oxygen diffusion across your lungs.
2006-09-09 23:09:00 · answer #4 · answered by llistserver 1 · 0⤊ 0⤋
its a reflex attempt to get more oxygen in your blood stream, why its infectious i dont know, but it is
2006-09-09 23:04:11 · answer #5 · answered by Anonymous · 0⤊ 0⤋