... melanin in cells called melanocytes which are present in the stroma of the iris . Melanin is responsible for hair and skin colour as well as eye colour . The melanocytes of a blue iris have less melanin in them than those of a green ...
... anus. An anus, being the opening at the end of our digestive tract, is where we get rid of undigested food waste, fibre, bacteria from the digestive tract, water and other indigestibles. To us, it is just excrement and an anus has only ...
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