our leg bones and leg muscles
it affect it by giving us a place to stand it may keep our air in but keeps us in it too.
The Yiddish word for "stay straight" or "stand straight" is "steyben" (שטייבן).
We ties a stick on his leg and hand by which it stand straight
straight
Inertia
your spine....
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some ppl have naturally straight hair...
keeps it swimming straight
House
It doesn´t always stand straight. (But you are right, most of the time it does) It is weightless, so it flows.
Gravity keeps you on the earth.....