2007-03-24 13:20:40 · 10 answers · asked by Brunette Diamond 5 in Science & Mathematics ➔ Biology
beings as in animals plants not humans
2007-03-24 13:24:13 · update #1
As far as I know, most vertebrates have red blood. Blue blood is something of a myth, since most biology books show unoxygenated blood as blue. Blood is red due to the presence of hemoglobin, a protein that contains iron and is responsible for carrying almost all the oxygen and some of the carbon dioxide in the blood.
Invertebrate animals that have circulatory systems rarely have red blood, because the transport fluid doesn't contain hemoglobin. Blood color in these animals can range from yellow to blue to green to clear.
Plants don't have blood, per se, but do have a transport system consisting of xylem (which transports water from the roots to other parts of the plant) and phloem (which primarily transports sugars from leaves to other parts of the plants). The fluids in these transport systems are generally clear to amber/yellow/brown colored.
2007-03-24 15:06:33 · answer #1 · answered by the_way_of_the_turtle 6 · 0⤊ 0⤋
a single-celled organism does not need a circulatory system as its usually small and nutritive substances dont need to be transported by arteries and veins.. on the other hand a human being or any other animal as a multi-celled organism has a circulatory system so that i.e. oxygen gets to all parts of the body and i guess since the blood contains erythrocytes (which are the ones that transport oxygen) its red.. and plants have so called floem and xylem which we could consider as their circulatory system to transport sucrose etc..
2007-03-24 20:44:26 · answer #2 · answered by LuCy 2 · 0⤊ 0⤋
It's a myth that humans have blue blood. The blood vessels in your arms appear blue because the connective tissue on the outer layer of each vessel is that color. However, blood that is deoxygenated is perhaps a little darker than oxygen-rich blood.
2007-03-24 21:03:18 · answer #3 · answered by Diff 1 · 0⤊ 0⤋
Only animals have "blood" and not even most of them. The color of the "blood" relies entirely on the proteins carrying oxygen throughout the body called hemoproteins. These hemoproteins contain iron or other metal ions which pigment their medium, giving color to blood and blood analogs. The color of the pigment can change based on the amount of oxygen they are carrying.
2007-03-25 01:11:11 · answer #4 · answered by sam j 2 · 0⤊ 0⤋
Crustacions (Crabs, Lobsters) have green blood.
I have heard that some animals (including humans) have blue blood that when reacts with oxygen (air) turns red.
2007-03-24 20:29:55 · answer #5 · answered by j3falcon 1 · 0⤊ 0⤋
All mammals have red blood. all vertebrate have blood. Some non-vertebrates have no blood (such as a sponge). Trees and plants have phloem.
2007-03-24 20:29:11 · answer #6 · answered by misoma5 7 · 0⤊ 0⤋
Nope. Some things are Single celled organisms meaning they are one cell.
2007-03-24 20:25:33 · answer #7 · answered by Mg2 2 · 0⤊ 0⤋
No, although all mammals have red blood.
Some frogs have green blood, for instance...
2007-03-24 20:24:07 · answer #8 · answered by flywho 5 · 0⤊ 0⤋
roaches have white blood. flies have yellow blood. This is all quite disgusting.
2007-03-24 22:13:47 · answer #9 · answered by M45-S355 l_l532 2 · 0⤊ 0⤋
yes, people don't have pink or yellow blood
2007-03-24 20:22:51 · answer #10 · answered by Professor Small - check myspace 2 · 0⤊ 1⤋