Because the brain sends messages for your muscles to move your arm through the nervous system.
Hi!
That is true. When tennis players apply top spin, they sweep their arm across an imaginary plane, rotating around their elbow, essentially how a windshield wiper moves, except without the glass, and the forearm as the wiper.
Hope this helped!
Hi !!
I hope I'm wrong, but i'd say 65% ......
Answer:
Must be remembered that flexion at the knee results in moving the lower leg posteriorly, unlike the upper limb where flexion of the elbow results in anterior movement of the forearm.
Explanation:
