pronator teres and supinator
Chat with our AI personalities
Muscles involved in opening a door typically include the biceps brachii, deltoids, and pectoralis major in the arm and shoulder region, along with muscles in the forearm such as the brachioradialis and extensor muscles. Additionally, the muscles of the back and core may also be engaged to provide stability and support during the movement.
The opening that is controlled by the muscles of the iris is called the pupil. The iris is responsible for adjusting the size of the pupil in response to different lighting conditions.
Sphincter muscles. This muscles contract around orifices keep the body contained.
Muscles involved in pushing hard against a wall include the chest (pectoralis major), shoulders (deltoids), triceps, and core muscles for stabilization and power generation. This action primarily engages the upper body muscles.
There are 11 pairs of external intercostal muscles in humans. These muscles are located between the ribs and are involved in expanding the chest cavity during inhalation.
Sphincter muscles. They are smooth muscles found in various parts of the body, such as the digestive system and urinary tract, and control the opening and closing of tubes or openings.