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The muscular system is composed of muscle cells and tissues that bring about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, which is attached to bones and allows the voluntary movement of limbs; smooth muscle, which is found in internal organs and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems; and cardiac muscle, which forms the powerful walls of the heart.
| Characteristics | Values |
|---|---|
| Definition | The muscular system is composed of muscle cells and tissues that bring about movement of an organ or body part. |
| Types of muscle | There are three kinds of muscle: skeletal, smooth, and cardiac. |
| Skeletal muscle | Attached to bones and allows the voluntary movement of limbs. The largest percentage of muscles in the muscular system are skeletal muscles. There are almost 650 skeletal muscles in the human body. |
| Smooth muscle | Found in internal organs and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems. Smooth muscle is also known as visceral muscle. |
| Cardiac muscle | Forms the powerful walls of the heart. The heart is the only organ that is also a muscle. |
| Muscle groups | Fitness trainers or physical therapists may talk about strengthening or working out specific muscle groups. |
| Muscle weight | Muscles account for around 40% of a person's weight, with the largest muscle in the body being the gluteus maximus in the buttocks. |
| Conscious control | Skeletal muscles are the only muscles that can be consciously controlled. |
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Types of muscle
The muscular system is composed of muscle cells and tissues that bring about the movement of an organ or body part. There are three types of muscle: skeletal muscle, smooth muscle, and cardiac muscle.
Skeletal muscles are attached to bones and enable voluntary body movements. There are almost 650 skeletal muscles in the human body. They are the only muscles that can be consciously controlled. Any action that a person consciously undertakes involves the use of skeletal muscles, such as running, chewing, and writing.
Smooth muscles line the inside of blood vessels and internal organs, such as the stomach, and are also known as visceral muscle. They aid in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems.
Cardiac muscle is a special type of muscle tissue that forms the powerful walls of the heart. The heart is the only organ that is also a muscle and the only place in the body that has cardiac tissue.
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Skeletal muscle
The muscular system is composed of muscle cells and tissues that enable the movement of an organ or body part. There are three types of muscle: skeletal, smooth, and cardiac. Skeletal muscle is attached to bones and allows for the voluntary movement of limbs. There are almost 650 skeletal muscles in the human body, accounting for the largest percentage of muscles in the muscular system. They are the only muscles that can be consciously controlled.
Smooth muscle, on the other hand, is found in internal organs and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems. Smooth muscle lines the inside of blood vessels and organs, such as the stomach, and is also known as visceral muscle.
Finally, cardiac muscle forms the powerful walls of the heart. The heart is the only organ in the body that is also a muscle. It is made of a special type of muscle tissue called cardiac muscle.
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Smooth muscle
The muscular system is composed of muscle cells and tissues that bring about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, smooth muscle, and cardiac muscle.
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Cardiac muscle
The muscular system is composed of muscle cells and tissues that bring about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, smooth muscle, and cardiac muscle.
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Muscle groups
The muscular system is composed of muscle cells and tissues that bring about movement of an organ or body part. There are three kinds of muscle: skeletal muscle, smooth muscle, and cardiac muscle.
Skeletal muscle is attached to bones and allows the voluntary movement of limbs. There are almost 650 skeletal muscles in the human body, and they make up the largest percentage of muscles in the muscular system. Any action that a person consciously undertakes involves the use of skeletal muscles, such as running, chewing, and writing.
Smooth muscle is found in internal organs and aids in the involuntary movements that occur in the circulatory, digestive, excretory, reproductive, and respiratory systems. It also lines the inside of blood vessels and is also known as visceral muscle.
Cardiac muscle forms the powerful walls of the heart and is the only organ in the body that is also a muscle. It is made of a special type of muscle tissue.
Fitness trainers or physical therapists may talk about strengthening or working out specific muscle groups.
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Frequently asked questions
The muscular system is the system in the body composed of muscle cells and tissues that brings about movement of an organ or body part.
The three types of muscle are skeletal muscle, smooth muscle and cardiac muscle.
Skeletal muscles are attached to bones and enable voluntary body movements. There are almost 650 skeletal muscles in the human body.
Smooth muscles control movement in other internal organs and structures. They line the inside of blood vessels and organs, such as the stomach.
Cardiac muscles make up the walls of the heart. The heart is the only organ that is also a muscle.
