What job does the cartilage in knee and elbow have?

Cartilage in the knee and elbow joints serves several crucial functions:

1. Load-Bearing and Weight Distribution:

- Cartilage acts as a load-bearing surface within the knee and elbow joints. It helps distribute weight evenly across the joint, reducing stress on the underlying bone. This is particularly important in weight-bearing joints like the knee.

2. Shock Absorption:

- Cartilage has shock-absorbing properties that help cushion the impact and vibrations during movement. This shock absorption mechanism protects the bones and other joint structures from excessive forces and wear.

3. Smooth Joint Movement:

- Cartilage provides a smooth, low-friction surface that allows the bones within the knee and elbow joints to glide effortlessly against each other during movement. This smooth movement reduces wear and tear on the joint surfaces.

4. Joint Lubrication:

- Cartilage produces a lubricating fluid called synovial fluid that nourishes and lubricates the joint. This fluid reduces friction between the joint surfaces and helps maintain joint flexibility.

5. Joint Congruence:

- The shape and contours of cartilage help create a congruent fit between the bones within the knee and elbow joints. This congruency ensures stability and prevents excessive movement or dislocation of the joint.

6. Joint Protection:

- Cartilage protects the underlying bone and other joint structures from direct contact and wear. This protection is crucial for long-term joint health and function.

Healthy cartilage is essential for the proper functioning of knee and elbow joints. Damage or degeneration of cartilage can lead to pain, stiffness, swelling, and decreased joint mobility. Conditions such as osteoarthritis, cartilage tears, and other injuries can affect the cartilage and cause joint problems.