MUSCLES
Muscles are attached to bones and are moved in one direction. In order for muscles to
be able to move in more than one direction they are paired with another muscle. Muscles have to ability to contract and are made up of cells.
There are three types of muscles that make up the human body
according to Walker (2001),
Skeletal muscles, as their name suggests, move the skeleton. They are attached to
bones across joints by tough cords called tendons. Smooth muscle is found in the walls
of hollow organs such as the small intestine, bladder, and blood vessels. Cardiac
muscle is found only in the wall of the heart where it contracts tirelessly over a lifetime, pumping blood around the body.
It contracts automatically, although nerve impulses from the brain speed it up or slow down according to the body’s
demands. (p.14)
THREE TYPES OF MUSCLES:
1. Skeletal Muscles--Move the skeleton
2. Smooth Muscles--Found in the walls of hollow organs
3. Cardiac Muscles--Found only in the wall of the heart
The body is given its shape by muscles which make up 40 percent of the body’s mass with more than 640 skeletal muscles. “There are more than 100 muscles in your face.
You use about 30 of your face muscles every minute to show what you are feeling” (Wilkes, 1994, p. 11). Muscles appear in layers. “Most skeletal muscles are given a Latin name that relates to their shape, location, or the movement they produce” (Walker, 2001, p. 14). Fibers are cells that make up muscles. “Each muscle fiber is made of dozens or hundreds of even thinner parts, called muscle fibrils or myofibrils” (Parker, 2003, p. 22). The type of muscle is determined by the size and shape of the fiber. “The cylindrical fibers of the skeletal muscle can reach up to 12 inches (30 centimeters) long” (Walker, 2001, p. 15). To push food through the digestive system, smooth muscles are contracted slowly. The cardiac muscles can be found only in the wall of the heart. These muscles pump blood around the
body and are contracted automatically. The bones are held together by ligaments. Ligaments are very strong and can stretch slightly. Another connective tissue found in joints is cartilage. Cartilage can also be found at the ends of bones which allow bones to glide over another.
be able to move in more than one direction they are paired with another muscle. Muscles have to ability to contract and are made up of cells.
There are three types of muscles that make up the human body
according to Walker (2001),
Skeletal muscles, as their name suggests, move the skeleton. They are attached to
bones across joints by tough cords called tendons. Smooth muscle is found in the walls
of hollow organs such as the small intestine, bladder, and blood vessels. Cardiac
muscle is found only in the wall of the heart where it contracts tirelessly over a lifetime, pumping blood around the body.
It contracts automatically, although nerve impulses from the brain speed it up or slow down according to the body’s
demands. (p.14)
THREE TYPES OF MUSCLES:
1. Skeletal Muscles--Move the skeleton
2. Smooth Muscles--Found in the walls of hollow organs
3. Cardiac Muscles--Found only in the wall of the heart
The body is given its shape by muscles which make up 40 percent of the body’s mass with more than 640 skeletal muscles. “There are more than 100 muscles in your face.
You use about 30 of your face muscles every minute to show what you are feeling” (Wilkes, 1994, p. 11). Muscles appear in layers. “Most skeletal muscles are given a Latin name that relates to their shape, location, or the movement they produce” (Walker, 2001, p. 14). Fibers are cells that make up muscles. “Each muscle fiber is made of dozens or hundreds of even thinner parts, called muscle fibrils or myofibrils” (Parker, 2003, p. 22). The type of muscle is determined by the size and shape of the fiber. “The cylindrical fibers of the skeletal muscle can reach up to 12 inches (30 centimeters) long” (Walker, 2001, p. 15). To push food through the digestive system, smooth muscles are contracted slowly. The cardiac muscles can be found only in the wall of the heart. These muscles pump blood around the
body and are contracted automatically. The bones are held together by ligaments. Ligaments are very strong and can stretch slightly. Another connective tissue found in joints is cartilage. Cartilage can also be found at the ends of bones which allow bones to glide over another.
Click the link below to learn more about the Muscular System