Parts of somatic nervous system Edit. There are 43 segments of nerves in the human body. With each segment, there is a pair of sensory and motor nerves. In the body, 31 segments of nerves are in the spinal cord and 12 are in the brain stem.
In fact, as the Moon travels around the Earth in a counter-clockwise orbit every 27.5 days, it also completes one full rotation on its axis â also moving in a counter-clockwise direction.
The Effect of the Earthâs Rotation & Revolution. When watching the stars at night, they do appear to move very slowly. This is because the Earth is constantly moving. The Earth completes one ârotationâ every twenty-four hours. A rotation is when the planet spins around once. The Earth rotates counterclockwise; this is why the Sun ârisesâ in the East and âsetsâ in the West. It is not the Sunâs movement that causes days, but rather the Earth turning around in front of the Sun.