2007-02-17 09:59:46 · 4 answers · asked by lisandra l 1 in Science & Mathematics ➔ Biology
withoutitican'thitthespacebar.
2007-02-17 10:11:28 · answer #1 · answered by Strix 5 · 0⤊ 0⤋
The key thing about the thumb is that it is OPPOSABLE to the other fingers. That give us very fine control, like picking up one grain of rice.
It can also be used to lock the other fingers, in a POWER GRIP. That means we can use a piece of wood as a club, for example.
2007-02-17 10:05:22 · answer #2 · answered by Anonymous · 0⤊ 0⤋
We had an ancestor who liked to knap stone -- and the chicks at the time dug him. Our hands appear to be adapted to holding and using tools. Yes, this includes the positioning and opposability of the thumb to the palm.
2007-02-17 10:14:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Because without the thumb you wouldnt be able to grab things
2007-02-17 10:08:26 · answer #4 · answered by Casey 5 · 0⤊ 0⤋