2006-09-22 11:41:19 · 38 answers · asked by Anonymous in Entertainment & Music ➔ Polls & Surveys
Human blood is ALWAYS red. Really. Anyone who says it's blue is mistaken.
This is plainly obvious if you ever donate blood. Phlebotomists always take blood from veins, and it always looks red.
Now, I know what some of you are thinking: 'Wait a minute - I can see some of my veins and they are obviously blue!'. It's okay. There are scientists who have wondered about that too:
In a recent piece of research, it was discovered that veinous blood look blue only because it's surrounded by much redder blood. They could even reproduce the effect by surrounding red veinous blood with a pool of red oxygenated blood... the veinous blood began to look blue!
Of course, there are creatures in the world that do not have red blood - some have greenish-blue blood because they use copper atoms to attract oxygen instead of iron. It doesn't work anywhere near as well, unfortunately for octopi and mollusks out there.
2006-09-22 11:51:01 · answer #1 · answered by Doctor Why 7 · 1⤊ 0⤋
Blue
2006-09-22 13:13:53 · answer #2 · answered by Anry 7 · 0⤊ 1⤋
Red
2006-09-22 11:42:11 · answer #3 · answered by Judas Rabbi 7 · 2⤊ 0⤋
Red
2006-09-22 11:47:04 · answer #4 · answered by p.g 7 · 2⤊ 1⤋
Red. Surprise!
2006-09-22 11:43:14 · answer #5 · answered by Rose 4 · 2⤊ 0⤋
Blue inside
red outside
2006-09-22 11:44:21 · answer #6 · answered by shookyloo® 5 · 1⤊ 2⤋
Yellow
2006-09-22 11:43:15 · answer #7 · answered by Backwoods Barbie 7 · 0⤊ 2⤋
It's red when it's exposed to the light. Before that it doesn't have a colour because colour is just reflected light.
2006-09-22 11:47:05 · answer #8 · answered by Dr Know It All 5 · 1⤊ 0⤋
Red....and blue. Wish I could drink gatoraide and scape my knee and it come out the color of the drink!
2006-09-22 11:42:37 · answer #9 · answered by weezy627 2 · 1⤊ 1⤋
Blue!
2006-09-22 11:42:54 · answer #10 · answered by STONE 5 · 1⤊ 2⤋