Beinagrindavöðvi
Beinagrindavöðvi, also known as skeletal muscle, is one of the three major muscle types in the human body, alongside smooth muscle and cardiac muscle. It is a striated muscle tissue, meaning it has a striped appearance under a microscope due to the arrangement of its contractile proteins, actin and myosin. Skeletal muscles are voluntary muscles, meaning their contraction is under conscious control. They are attached to bones by tendons and are responsible for all voluntary movements of the body, such as walking, running, lifting, and manipulating objects.
The structure of skeletal muscle is complex. It is composed of bundles of muscle fibers, which are
Skeletal muscles are crucial for posture, heat generation, and protecting internal organs. They play a vital