Researchers reveal process of making ribs
Geplaatst op 27 april 2010 - 14:08
ScienceDaily (Apr. 27, 2010) ó Like all vertebrates, snakes, mice and humans have in common a skeleton made of segments, the vertebrae. But a snake has between 200-400 ribs extending from all vertebrae, from the neck to the tail-end, whereas mice have only 13 pairs of ribs, and humans have 12 pairs, in both cases making up the ribcage
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