I am wondering why mammals have heart on left side of body. Is there any advantage for survival; i.e evolution point of view?
2007-01-31 05:54:28 · 4 answers · asked by LIONTAMER 1 in Science & Mathematics ➔ Biology
The Pikaia from which all vertibrates are descended were asymetric. We have superficial symetry but internally we retain the asymetry of our ancestor.
2007-01-31 06:07:51 · answer #1 · answered by Red P 4 · 0⤊ 0⤋
Humans do not have hearts on the left side, the heart is in the center. But it beats stronger in the left side, so we tend to hear heart beatings in the left side. The reason it beats stronger is because of the way it is designed. I don't remember details, but the heart is a blood pump, and if I'm not mistaken, it goes from left to right, so it beats stronger on the left to push the blood to the right and out through the arteries.
2007-01-31 06:16:14 · answer #2 · answered by dahfna 3 · 1⤊ 2⤋
Actually, I think it's really closer to the middle, under the "sternum". In that case maybe it's protected by being there.
2007-01-31 06:02:48 · answer #3 · answered by K.B. 4 · 1⤊ 0⤋
It's funny... I was wondering about that last night =P. I found this article... and it was pretty interesting.
http://www.news.harvard.edu/gazette/2002/10.24/01-hand.html
Hope this answers your question =)
2007-01-31 06:04:22 · answer #4 · answered by xtina* 2 · 0⤊ 0⤋