Question

is GIT have any voluntary muscles

Answer 1

Explanation:

Involuntary muscles, which are also known as smooth muscles, are the muscles in the human body that act without conscious control or cannot be controlled at will. They are mainly controlled by the autonomic nervous system in the body. So, involuntary muscles include all the muscles whose activity is not affected by voluntary nerve activity.

The involuntary muscles are spindle-shaped and contain a single, centrally located nucleus. They are visceral so mostly found in the walls of hollow organs such as the stomach, intestine, urinary bladder, uterus, etc. They are responsible for the movement of food in the alimentary canal, contraction of the uterus during labor or childbirth and controlling the internal diameter of the blood vessels. Cardiac muscles are also involuntary muscles; they maintain the blood circulation throughout the body by maintaining the heartbeat.

Answer 2

Explanation:

Voluntary muscles are the muscles that are under conscious control and can be controlled at will or we can choose when to use them. They are also known as skeletal muscles as they are attached to the bones.

Voluntary muscles are responsible for the movement of body parts and the locomotion. They are made up of muscle fibers which are multinucleated cells with nuclei located towards the periphery of the cells. The cell membrane of a muscle fiber is known as sarcolemma. The muscle fibers are arranged together in a bundle to form the muscle. The strength of voluntary muscles can be increased by exercising regularly.