Question

Is all blood red?

Answer 1

Blood color:

1. Humans have red blood, but different organisms have different colored blood depending upon the compounds which transport oxygen in their system.
2. All mammals, reptiles, birds, and amphibians have red pigment hemoglobin (which contains iron).
3. Some crustaceans, mollusks, and insects have a blue pigment hemocyanin (which contains copper) in their blood. For example spiders, octopuses, crabs, lobsters, scorpions, etc.
4. Some annelids like leeches have a green pigment chlorocruorin in their blood.
5. Some arthropods like cockroaches have colorless blood because of pigment hemolymph in their blood.
6. Some other blood colors found in organisms are green blood in skinks, purple blood in peanut worms and brachiopods, and yellow blood in sea cucumbers and beetles.
7. So, not all blood is red, some organisms also have different colored blood.