two functions: transport of o , co , hormones, nutrition and waste products and a structural function: a hydroskeleton. the transport capacity of the blood for o and co is enhanced by the chemical substance hemocyanine in the blood cells. hemocyanine fulfils the same function as haemoglobin does in mammals...
pluripotent. totipotent stem cells have the potential to become any cell in the body. pluripotent stem cells can become any type of cell in the body except those needed to develop a fetus. adult stem cells, by contrast, are unspecialized cells that occur in specialized tissue. these stem cells are found in mammals...