The document discusses the muscular system and how muscles function. It explains that muscles contract and relax to cause movement, with antagonistic muscle pairs like the biceps and triceps working together. Voluntary muscles are controlled by the brain and nervous system to allow movements like running, jumping, and walking. Maintaining a balanced diet, regular exercise, fresh air, and pure water can help keep muscles healthy.

1. David Calle Ismael Akram Jorge Martín Daniel Senovilla Adrián Garrido

2. The muscular system consist of all the muscles in the body, all their functions, the movements that the muscles do…We are going to talk about things that you can do to help the muscles and things you never must do because they damage the muscles.

6. Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. Musculature and skeleton work together. Muscles joint to the bones with tendons. The musculoskeletal system allows us to run, jump,swim , ride a bike or walk.