Stem cells are undifferentiated cells that have the ability to become specialized cells such as skin, bones, muscles, etc. The two main sources of stems cells are embryos at the embryonic stage of development (blastocyst) and adult tissue. They can be found in bone marrow, blood vessels, muscles, skin, liver, the brain, nasal mucosa, fatty […]
There are different growls that dogs use to make us understand what they’re feeling and get their point across to us. The lower the pitch, the more dangerous the growl is. Usually dogs growl as a warning, letting us know if we don’t stop and stay away, we may be bitten. Female dogs may growl […]
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