To raise an arm upward, the muscle on one side of its contract, and the muscle relaxes on the opposite side of the arm.
Muscles are a kind of soft tissue. Your muscles are made up of a lot of flexible fibers. Your body is made up of around 600 muscles.
Muscles are used for a variety of purposes. Some muscles aid in running, jumping, and delicate operations such as threading a needle.
To raise an arm upward, the muscle on one side of its contract, and the muscle relaxes on the opposite side of the arm.
Due to muscle relaxation, the arm will be able to move upwards.
To learn more about the muscles refer to the link;
https://brainly.com/question/9883108
