The muscular system is depicted as an organ system that significantly consists of three main muscles that are skeletal, smooth as well as cardiac muscles. These muscles permits the general movements of a human body as well as helps the human body to maintain the posture. Moreover, these muscles also helps in the blood circulation in the overall human body.
Skeletal muscles: These are the only muscles within the human body that can be controlled consciously. These muscles are attached with the bones and the contraction of these muscles helps in the movement of the human bones. Any action that is perceived by an individual undertakes consciously includes the usage of the skeletal muscles. This includes the activities such as chewing, running as well as writing.
Smooth muscles: These muscles include the muscle lines present within the blood vessels as well as organs. This includes the stomach and is known as the visceral muscle. This is depicted as the weakest muscle but plays an essential role while moving food within the digestive tract. Moreover this maintains the constant circulation of the body throughout the blood vessels. The action of the smooth muscles are involuntary as well as they cannot be controlled consciously.
Cardiac muscles: These muscles are specifically located in the heart. These muscles primarily pumps the blood throughout the overall body of a human being. This muscles moreover stimulates its own contractions, which forms sound of human heartbeat. The signals from the nervous system controls the rate of contraction. This muscles are depicted to be very strong as well as it can act involuntarily.
Functions of the muscular system: The primary functions that are depicted in regards to the muscular systems are stated briefly:
Mobility: The particular function of the muscular system is that it allows movement. When the contraction of muscles happen they contribute to the gross as well as fine movement of the human body. The gross movement refers to walking, swimming as well as running whereas the fine movement refers to speaking, writing as well as making facial expressions. The skeletal muscles are usually responsible for this type of actions.
Circulation: The heart primarily helps in the blood circulation as well as pump of the overall blood in the whole human body. The movement of the heart is primarily outside conscious control and it automatically contracts when the stimulation is done by the electric signals. The cardiac muscles are primary responsible for this type of action.
Digestion: The smooth muscles present in the gastrointestinal part controls the digestion of the food within a human body. The movement of the food is done through the digestive system considering a wave like motion which is known as peristalsis. Muscles present within the walls of hollow organs tends to contract as well as relax that further intends to cause this type of movement. Moreover, this pushes food via the oesophagus into the human stomach. The upper muscle within the stomach relaxes further for allowing the food to enter, whereas the lower muscles mixes the food particles with the present stomach acid as well as enzymes.
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