EVERYDAY SCIENCE

Detailed explanation-1: -One very important involuntary muscle is your heart, which keeps beating all day and night. Other involuntary muscles help digest food and are found in your stomach and intestines.

Detailed explanation-2: -Cardiac muscle cells are located in the walls of the heart, appear striped (striated), and are under involuntary control.

Detailed explanation-3: -Cardiac muscles are said to be involuntary because they are not controlled by our will. These muscles are found in heart and are the only muscles which work throughout the life without getting tired or fatigue.

Detailed explanation-4: -A cardiac muscle is called an involuntary muscle because it can contract and relax on its own. So, the heart beats by itself without us having to think about it. Other muscles in our body, like leg or arm muscles, are voluntary muscles.

Detailed explanation-5: -Involuntary muscles are present in the walls of the digestive system, blood vessels, bronchi, uterus and bladder. Although they are formed by special striated muscle fibers that are not smooth, they still belong to the smooth muscle group, as well as the heart muscle group.