Joints in Human Skeletal
Joint is any place in our body where two or more bones come together. The bones in healthy joints kept enough apart by a thin layer of cartilage so that they do not rub against each other as they move.
The bones are held in place at these joints by a tough band of tissue called ligament. Many joints in our body, such as in our knee, are held together by more than one ligament. Muscle move bones by moving joints.
There are two kinds of joints in our skeletal system, that is immovable joints and movable joints. Let's see what the meaning of this kind of joints.
Immovable Joints
An immovable joint is a joint that allows a little or no movement. The joints of the bones in our skull and pelvis are classified as immovable joints.
Movable Joints
All movement that we do in our daily activity requires movable joints. A movable joint allows the body to make a wide range of motions.
There are several types of movable joints:
1. Pivot
In a pivot joint, one bone rotates in a ring of another bone that does not move. Turning our head is an example of a pivot movement.
2. Ball and Socket
A Ball and Socket joint consist of a bone with a rounded end that fits into a cuplike cavity on another bone. A ball and socket joint provides a wide range of motion than a pivot joint does. Swing the legs and arms is an example of ball and socket movement. We can move our legs and are almost in any directions.
3. Hinge
This is the third type of joint, called Hinge. This joint has a back-and-forth movement just like hinges on a door. Elbows, knees, and fingers have hinge joints. Hinge joints have a smaller range of motion than the ball and socket joint. They are not dislocated as easily, or pulled apart, as a ball and socket joint can be.
4. Gliding
Gliding is the fourth type of the joint in the human skeletal system. Gliding is a joint in which one part of the bones slide over another bone. Gliding joints also move in a back-and-forth motion and are found in our wrists and ankles and between vertebrate. Gliding joints use the most for resulting movement in our body We can't write a sentence, use a joystick, or take a step without using a gliding joint.
When we rub two pieces of chalk together, their surface began to wear away, and they get reshaped. Without the protections of cartilage at the end of the bones, they also would wear away at the joint, just like the chalk. Cartilage has very important role in the movement. Cartilage helps make joint movement easier. It reduces frictions and allows the bone to slide more easily over each other.
Pads of cartilage, called disks, are located between the vertebrae in our back. Thye acts as a cushion and prevents injury to our spinal cord. A fluid that comes from nearby blood vessel also lubricates the joint.
Our skeleton is a living framework of bone. Bones support the body and supply it with mineral and blood cells. Joints make the framework flexible.
Joints Problems
Arthritis is the most common joint problem. The term arthritis describes more that 100 different disease thatcan damage the joints. About one of every seven people is suffers from artritis. All form of arthritis begin with the same symptoms : pain, stiffness, and swellingof the joints.
Two commons type of artritis include osteoartritis and rheumatoid arthritis. Older people often suffer form osteoartritis, in which cartilage breaks down because of years of use. Rheumatoid arthritis occurs in both young and older adults. This disorder is an ongoing condition in which the body's immune system tries to destroy its own tissues.
Related Post :
The Functions and Structure of Human Skeletal System
The bones are held in place at these joints by a tough band of tissue called ligament. Many joints in our body, such as in our knee, are held together by more than one ligament. Muscle move bones by moving joints.
There are two kinds of joints in our skeletal system, that is immovable joints and movable joints. Let's see what the meaning of this kind of joints.
Immovable Joints
An immovable joint is a joint that allows a little or no movement. The joints of the bones in our skull and pelvis are classified as immovable joints.
Movable Joints
All movement that we do in our daily activity requires movable joints. A movable joint allows the body to make a wide range of motions.
There are several types of movable joints:
1. Pivot
In a pivot joint, one bone rotates in a ring of another bone that does not move. Turning our head is an example of a pivot movement.
2. Ball and Socket
A Ball and Socket joint consist of a bone with a rounded end that fits into a cuplike cavity on another bone. A ball and socket joint provides a wide range of motion than a pivot joint does. Swing the legs and arms is an example of ball and socket movement. We can move our legs and are almost in any directions.
3. Hinge
This is the third type of joint, called Hinge. This joint has a back-and-forth movement just like hinges on a door. Elbows, knees, and fingers have hinge joints. Hinge joints have a smaller range of motion than the ball and socket joint. They are not dislocated as easily, or pulled apart, as a ball and socket joint can be.
4. Gliding
Gliding is the fourth type of the joint in the human skeletal system. Gliding is a joint in which one part of the bones slide over another bone. Gliding joints also move in a back-and-forth motion and are found in our wrists and ankles and between vertebrate. Gliding joints use the most for resulting movement in our body We can't write a sentence, use a joystick, or take a step without using a gliding joint.
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| By OpenStax College - Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013 |
When we rub two pieces of chalk together, their surface began to wear away, and they get reshaped. Without the protections of cartilage at the end of the bones, they also would wear away at the joint, just like the chalk. Cartilage has very important role in the movement. Cartilage helps make joint movement easier. It reduces frictions and allows the bone to slide more easily over each other.
Pads of cartilage, called disks, are located between the vertebrae in our back. Thye acts as a cushion and prevents injury to our spinal cord. A fluid that comes from nearby blood vessel also lubricates the joint.
Our skeleton is a living framework of bone. Bones support the body and supply it with mineral and blood cells. Joints make the framework flexible.
Joints Problems
Arthritis is the most common joint problem. The term arthritis describes more that 100 different disease thatcan damage the joints. About one of every seven people is suffers from artritis. All form of arthritis begin with the same symptoms : pain, stiffness, and swellingof the joints.
Two commons type of artritis include osteoartritis and rheumatoid arthritis. Older people often suffer form osteoartritis, in which cartilage breaks down because of years of use. Rheumatoid arthritis occurs in both young and older adults. This disorder is an ongoing condition in which the body's immune system tries to destroy its own tissues.
Related Post :
The Functions and Structure of Human Skeletal System
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