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The human body contains more than 600 muscles, which are responsible for a wide range of functions. Muscles allow us to move, speak, chew, and swallow. They also control our heartbeat, breathing, and digestion. The muscular system is involved in seemingly unrelated functions, such as temperature regulation and vision. The main function of the muscular system is to enable movement through muscle contractions, which can be either voluntary or involuntary.
| Characteristics | Values |
|---|---|
| Allow movement | Gross and fine movement |
| Control heartbeat | |
| Control breathing | |
| Aid digestion | |
| Stabilise the body | |
| Protect bones and organs | Absorb shock and reduce friction in joints |
| Maintain normal body temperature |
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What You'll Learn
Muscles allow movement, including walking, speaking and chewing
The muscular system is made up of over 600 muscles, and each has a part to play in how our bodies function. Muscles allow movement, including walking, speaking and chewing.
Skeletal muscles are the only muscles that can be consciously controlled. They are attached to bones, and contracting the muscles causes movement of those bones. Any action that a person consciously undertakes involves the use of skeletal muscles. For example, when you walk, it is your skeletal muscles that allow you to do so.
Muscles also control our heartbeat and breathing, aid in digestion, and stabilise our bodies. They protect the bones and organs by absorbing shock and reducing friction in the joints. Maintaining normal body temperature is an important function of the muscular system.
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Muscles control heartbeat and breathing
The muscular system is made up of over 600 muscles, and each has a part to play in how our bodies function. In addition to allowing movement, muscles control our heartbeat and breathing, aid in digestion, and stabilise our bodies.
The muscular system includes three muscle types: smooth, skeletal, and cardiac. Only skeletal muscles are voluntary, meaning you can control them consciously. Smooth and cardiac muscles act involuntarily. Each muscle type in the muscular system has a specific purpose. You’re able to walk because of your skeletal muscles. You can digest because of your smooth muscles. And your heart beats because of your cardiac muscle. The different muscle types also work together to make these functions possible.
Cardiac muscle, located only in the heart, pumps blood around the body. It stimulates its own contractions that form our heartbeat. Signals from the nervous system control the rate of contraction. This type of muscle is strong and acts involuntarily.
The muscular system also helps to maintain normal body temperature. The bones of the spine and the ribs provide further protection. Muscles also protect the bones and organs by absorbing shock and reducing friction in the joints.
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Muscles aid digestion
The muscular system is made up of over 600 muscles, each with a specific purpose. Muscles aid digestion by allowing the body to move food through the digestive system. Smooth muscles, which are involuntary, are responsible for digestion. They work together with skeletal muscles, which are the only type of muscles that can be consciously controlled, to make these functions possible.
The muscular system also controls our heartbeat and breathing, and stabilises our bodies. Muscles protect the bones and organs by absorbing shock and reducing friction in the joints. They also help to maintain normal body temperature.
The largest muscle in the body is the gluteus maximus in the buttocks. Skeletal muscles, which are attached to bones, allow us to move by causing the bones to move when they contract. Most muscle movement in the body is under conscious control.
Cardiac muscles, which are only located in the heart, pump blood around the body and stimulate their own contractions to form our heartbeat. They act involuntarily and are controlled by signals from the nervous system.
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Muscles stabilise the body
The muscular system is made up of over 600 muscles, which are categorised into three types: smooth, skeletal, and cardiac. Skeletal muscles are the only muscles that can be consciously controlled. They are attached to bones, and when they contract, they cause the bones to move. This allows a person to undertake any action that they consciously choose.
Smooth and cardiac muscles, on the other hand, act involuntarily. Smooth muscles aid in digestion, while cardiac muscles are responsible for the heartbeat. Cardiac muscles are only located in the heart and pump blood around the body. They stimulate their own contractions, which form the heartbeat, and the rate of contraction is controlled by signals from the nervous system.
In addition to allowing movement, muscles also protect the bones and organs by absorbing shock and reducing friction in the joints. They also play a role in maintaining normal body temperature.
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Muscles protect bones and organs by absorbing shock
The three types of muscle are smooth, skeletal, and cardiac. Smooth muscles are found in the digestive system and aid digestion. Skeletal muscles are attached to bones, and when they contract, they cause the bones to move. Cardiac muscle is found only in the heart, and it pumps blood around the body. It also stimulates its own contractions to form our heartbeat.
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Frequently asked questions
Muscles have a range of functions, including pumping blood, supporting movement, lifting heavy weights, giving birth, speaking, swallowing, and breathing.
Muscles work by contracting or relaxing to cause movement. This movement may be voluntary or involuntary.
The muscular system's main function is to allow movement. When muscles contract, they contribute to gross and fine movement. Gross movement refers to large, coordinated motions.
The three types of muscles are cardiac, skeletal, and smooth. Cardiac muscle makes up the walls of the heart, powering contraction and relaxation to enable circulation. Skeletal muscles connect with bones, tendons, and ligaments to support movement. Smooth muscle makes up the inside of organs such as the bladder, stomach, and intestines and plays a role in involuntary functions such as the digestive and urinary systems.
