A joint's function is to bear weight, perform work and exhibit a particular range of motion during movement where two or more bones come together for the purpose of movement. A joint moves when the muscles crossing it contract.Know More
Joints are classified based on how much motion they allow. Joints that do not move are known as synarthrosis. Examples of these include sutures of the skull and the gomphoses that connect the teeth to the skull. Joints that permit slight movement are classified as amphiarthrosis. These include the intervertebral disks of the spine and the pubic symphysis of the hips. Diarthroses joints have the largest range of movement and include joints in the shoulder, knees, wrists and elbows.
In addition to their range of movement, joints may be classified based on the material present in them. These include fibrous, synovial, which is the most common joint, and cartilaginous. Several types of synovial joints exist. They are ball and socket, hinge, saddle and gliding. Each type of synovial joint has a different range of motion. Ball and socket joints have the greatest range of motion. Hinge joints move in one direction only. Saddle joints have a 360 degree range of motion, and gliding joints allow bone movement in any direction.Learn more about Human Anatomy
According to Medline Plus, suture joints are also known as cranial sutures and are comprised of bands of fibrous tissue that connect the bones of the skull. Cranial sutures are necessary for brain growth and development.Full Answer >
According to the University of Maryland Medical Center, cartilage is located in the nose and ears, as well as several of the body's joints, including the knees, hips, shoulders and fingers. Cartilage is one of the body's chief connective tissues. It takes the form of a matrix and contains proteins, sugars and collagen. Wikipedia notes that cartilage is also found in intervertebral discs and the bronchial tubes.Full Answer >
Meissner's corpuscles, also known as tactile corpuscles, are nerve endings that are responsible for detecting a light touch to the skin. The are considered a type of mechanoreceptor since they are responsive to physical pressure. Meissner's corpuscles have the lowest sensitivity threshold of any type of mechanoreceptor; they can sense vibrations with frequencies as low as 10 Hertz.Full Answer >
The coelom is a space between the gut wall and the body wall that acts as a cavity for other organs. It begins to form during the stage of embryonic development where the body cavities develop, and it allows the body's organs to move around while offering some support to the skeletal system.Full Answer >