Scientists are building a catalogue of every type of cell in our bodies
A N ADULT HUMAN body consists of some 37trn cells. Not so long ago, these were thought to come in 220 different types. That number, the product of painstaking decades spent peering through microscopes at slides bearing tissue sections coloured by chemical stains, gave a sense of the division of cellular labour needed to keep a body running.
One is caused by tickling; the other by everything else
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https://www.economist.com/science-and-technology/2024/11/20/scientists-are-building-a-catalogue-of-every-type-of-cell-in-our-bodies