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small groups of cells found in the pancreas that secrete the hormones insulin and glucagon.
the destruction of a donated organ by the immune system of the recipient.
a small, corky pore or narrow line on the surface of the stem of a woody plant that allows the...
symbiosis where one organism lives on another (on the outside of another).
the last part of the mammalian large intestine, which stores faeces until it can be expelled...