Which one of the following secretes a watery fluid for lubricating and cushioning the joint

Options

A. Ligament
B. Cartilage
C. Tendon
D. Synovial membrane.

Answer

To answer the question "Which one of the following secretes a watery fluid for lubricating and cushioning the joint?" we will analyze the options provided: ligament, cartilage, tendon, and synovial membrane.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Ligament**: Ligaments are connective tissues that connect bone to bone. Their primary function is to provide stability to joints but they do not secrete any fluid.
- **Cartilage**: Cartilage is a type of connective tissue that provides cushioning between bones in a joint. However, it does not secrete any lubricating fluid.
- **Tendon**: Tendons connect muscles to bones. They play a crucial role in movement but do not secrete any lubricating fluid.
- **Synovial Membrane**: The synovial membrane lines the joint capsule and is responsible for secreting synovial fluid, which lubricates and cushions the joint.

2. **Identifying the Correct Answer**:
- Among the options, the synovial membrane is the only structure that secretes a watery fluid (synovial fluid) that lubricates and cushions the joints.

3. **Conclusion**:
- Therefore, the correct answer to the question is the **synovial membrane**.