A collection of tissues which work together to accomplish a function. The organisational unit above tissues and below systems.

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Why Is The Toughness Of Skin Different On Different Parts Of The Body?

My cat was licking my arm with his sandpaper like tongue. It hurt and the area he was licking was slightly smarting afterwards. However, when he licks the palm of my hand the feeling is rather ...
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Is there a biological process which causes organs to atrophy in response to enivronmental stressors?

I am aware of what happens when the body experiences starvation and breaksdown the muscles in the body for protein sources and the other processes that happen in such a scenario. However, i wondered ...