Describe different types of muscles the major and how they move?

There are three main types of muscles in the body: skeletal, smooth, and cardiac. Each type of muscle has a different structure and function.

Skeletal muscles are attached to bones and are responsible for voluntary movements, such as walking, running, and lifting objects. Skeletal muscles are striated, which means they have a striped appearance under a microscope. They are also innervated by somatic nerves, which are nerves that control voluntary movements.

Smooth muscles are found in the walls of hollow organs, such as the stomach, intestines, and blood vessels. Smooth muscles are not striated and are innervated by autonomic nerves, which are nerves that control involuntary movements.

Cardiac muscles are found in the heart. Cardiac muscles are striated and are innervated by autonomic nerves.

Here is a table summarizing the different types of muscles:

| Type of Muscle | Location | Function | Innervation |

|---|---|---|---|

| Skeletal | Attached to bones | Voluntary movements | Somatic nerves |

| Smooth | Walls of hollow organs | Involuntary movements | Autonomic nerves |

| Cardiac | Heart | Involuntary movements | Autonomic nerves |

Skeletal muscles move by contracting and relaxing. When a skeletal muscle contracts, it pulls on the bone that it is attached to, causing the bone to move. When a skeletal muscle relaxes, the bone returns to its original position.

Smooth muscles move by constricting and dilating. When a smooth muscle constricts, it narrows the passageway that it surrounds. When a smooth muscle dilates, it widens the passageway that it surrounds.

Cardiac muscles move by contracting and relaxing. When a cardiac muscle contracts, it pumps blood out of the heart. When a cardiac muscle relaxes, it allows blood to flow into the heart.