Your thumb contains the only saddle joint in the entire body. how would your hand function differently if your thumb contained a pivot joint? what if it contained a ball and socket joint? describe four consequences of having a different type of joint in the thumb.

The saddle joint that can be found in the thumbs ensures that it moves from side to side and rotate on its own axis alone.

In conclusion, if the thumb contained a pivot joint or a ball and socket joint, it'll be able to move more freely.

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They are the only joints that can do 360 degrees and rotate with their own axis. But, because of its free-moving, it is prone to any dislocation compared to other movable joints.

Explanation:

Hope this helps ❤

Sorry, someone deleted my first answer. Although, I am pretty sure this answer is very similar to the first answer I had. :)

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.  

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