Joints are right in the middle of all human movements. However, synovial joints are the most used joints in movements. They are the most developed joints and the only mobile joints. This means that they support all body movements. In structure, they are different from the other joints. They have got features that aid in movement. The synovial joints permit varying degrees of movements.
Characteristic Features of Synovial
Hyaline Cartilage: this is an elastic cartilage that covers all the articulate surfaces of all synovial joints. The cartilages are non-nervous and avascular. The cartilage is lubricated with synovial fluid that makes the surfaces slippery making movement easier.
Synovial fluids: all surfaces of synovial joints are lubricated with synovial fluid. This fluid makes the surfaces slippery. It is meant to make movements smooth and reduce friction between the articulating surfaces of the joints. This reduces tear and wears between the joint articulating surfaces. Joint pain facts say that most joint pains result from a reduction in synovial fluid.
Articulate capsule: This is a membrane that is rich in fibrous. This is the membrane that lines the synovial membrane. Because of its abundant fibrous supply, it is sensitive to stretch, and this is caused by movements.
Synovial membrane: This is the membrane that lines the entire joint. It is used to provide nourishment to the articulate cartilage. It secretes the synovial fluid that lubricates the synovial joints.
Types of Synovial Joints
Plane Synovial Joints
These joints have articular surfaces that are an almost plane in shape. They are important and allow gliding movement in various directions. Examples of these joints are intertarsal and intercarpal joints.
In these kinds of joints, the movement is in one place but along the transverse axis. They have a lock that makes sure that allows movement up to 180 degrees. Examples of such joints include the joints located in the knee and the elbow. Articulate surfaces are pulley shaped. They have collateral ligaments that are very strong and provide stability to these joints and support their movement.
These are joints that have an osteo-ligament ring that forms the pivot of the joint. They allow movement along the vertical axis, but in only one plane.
Ball and Socket Joints
They are formed of a groove and a ball that fits into the groove. They are also called the spheroidal joints. They allow movements in an indefinite number of the axis but all based on a common central point. They, therefore, allow movements like rotation, adduction, flexion, abduction, extension and circumduction. Examples are the shoulder and hip joints.
Blood Supply in Synovial Joints
The blood supply to all joints is essential. It is more important in synovial joints. This is because they have membranes that are paramount for movement. Blood supply is responsible for supplying nutrients to these membranes. Proper blood supply ensures that the membranes are in good condition. Types of joint pains depend on the condition of the joints and especially membranes. Blood supply is also essential to supply nutrients to the fibrous ends that are responsible for sensing movement.
Lymphatic drainage of synovial joints
Drainage is essential to maintain proper functioning of the joints. Synovial fluid needs to be created all the time. It is also important to drain the used fluid so as to give space for new fluid that is continually being secreted. This is important as it will reduce the chances of break down as a result of the reduction in the synovial fluid. Drainage is achieved through the rich blood system found around the joint region.
Stability of Synovial joints
For the proper functioning of the joints, the joints must be stable. This is achieved through the combined efforts of different components.
Muscles: Different muscles are responsible for the providing support to the different joints in the body. These muscles are important and help to maintain stability. Without properly built muscles, joints would be unstable and collapse when subjected to weights. Muscles are, therefore, necessary for movement.
Ligaments: all joints are created to allow given degrees of movements. For proper functioning and to avoid joint pains, joints need to be prevented from possible over movements. Joint ligaments are responsible for protecting joints against any over movements. Ligaments will support the joint membranes and prevent them from over movements. However, they may not protect joints from over a movement that is as a result of continuous strain. This is because the continuous strain leads to elongation.
While muscles and ligaments are responsible for stability, bones are responsible for support in firm joints. The bones are used to form a stable body structure that sustains the weight and body mass. The bones will also provide support to make movements smooth.
Bones are important for body movement. They should be taken care to make sure they are in good condition and to reduce joint pains during movements. Proper exercising may help in maintaining healthy joints.
David Gomes completed his M.S Professional degree in California Institute of Technology. He is a Health and Wellness expert. He lives in Oakland, California, USA. He loves to write on a variety of topics such as joint health, weight loss, beauty and skin care for blogs and on-line publication sites. He also loves latest technology, gadgets. You can connect with him on Twitter.
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