Why do our arms only bend 1 way??
Question:
Answers:
it is the same reason a normal door only opens one way
Other Answers:
because ur joints are positioned that way!
some people are born double jointed i consider them lucky for that
If they bent both ways yo would be bi-bendable. Oh OK . If your elbows bent bothways you would have to have EXTREEMLY large muscles in order to pick something up without dropping it or having your arms bend the wrong way
oooh it would be nasty if they went both ways, like Mr Wire man
I am scared of Mr Wire man and his two way bendy arms
Obviously the answer is multiple and relates to our gradual evolution to biped mammal. One plausible answe is the blood and nerve supply is carried to the extremities via vessels and nerves. Luckliy for us the bending of the arm in one direction allows these to bend slightly on themselves without cutting off supply. If faced with the other direction, they would inevitably stretch causing damage or at the very least limiting supply. It also allows our joints to lock so we can stand up (knee joint) for example. So that one doesn't hit themselves in the head from too much bendy swinging while walking. (It's a scientific fact)
because thats the way we are meant to be, imagine what it would look like if everyone had arms bending the opposite ways..but we can turn our arms lots of ways and there has to be some control in the joints too hense why we have arms only bending one way.we dont need them to bend the other way anyway.
Speak for yourself, both my arms are quite bendy backwards, especially the left one after breaking it when I was 6.
that's why we have shoulders
More Questions and Answers
- I am suffering form cracked side lips what should i do is there any vitamin deficiency?
- Is my basement apartment causing my sinus problems?
- what is the nice way to ask someone to stop smoking?
- Can too much sleep give you a spliting headache?
- I need information on writing a mission statement for my own web business?
- How do I prevent back pain at my job?
- my wife has pancreatitis, what should she eat?
- why does my pee smell like sugar puffs?