The first group is the muscles of the head and neck. By function, the muscles of the head are divided into chewing and facial muscles. The chewing muscles are necessary for mechanical grinding and mixing of food, that is, chewing. Mimic muscles carry out the opening and closing of the eyes, they give the face a certain expression, and are also necessary for the pronunciation of certain sounds. The muscles of the neck keep the head in balance and participate in the movement of the head and neck. The second group is the back muscles. They carry out the movements of the head, neck, shoulder blades, raise and lower their arms. The main function of the back muscles is to keep the body upright. The next group is the muscles of the chest. Some of them are involved in the movement of the hands, others are called intercostal muscles; they raise and lower their ribs as they breathe. The abdominal muscles are formed by the abdominal muscles. These are necessary for turning the body to the sides and bending. The abdominal muscles also include the diaphragm, which divides the body cavity into the chest and abdominal cavities and takes part in respiratory movements. The muscles of the shoulder girdle and the muscles of the arm provide movement of the arm. The pelvic muscles provide movement of the hip. The calf muscles are needed to move the foot, and the muscles in the foot flex and extend the toes.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.