True joints are

Options

A. Synovial joints
B. Synchondrosis
C. Syndesmoses
D. Symphyses

Answer

**Step-by-Step Solution:**

1. **Understanding Joints**: Begin by defining what joints are. Joints are the points of contact between two bones or between cartilage and bone.

2. **Types of Joints**: Recognize that joints can be classified into three major types:
- Fibrous joints
- Cartilaginous joints
- Synovial joints

3. **Defining Synovial Joints**: Focus on synovial joints, which are characterized by the presence of a fluid-filled synovial cavity. This cavity is located between the articulating surfaces of two bones.

4. **Function of Synovial Joints**: Understand that synovial joints allow for free movement between the bones, which is essential for locomotion and various other movements.

5. **Evaluating Options**: Analyze the provided options:
- **A. Synovial joint**: This is correct as synovial joints are considered true joints due to their ability to allow free movement.
- **B. Synchondrosis**: This is incorrect as it is a type of cartilaginous joint where hyaline cartilage connects two bones.
- **C. Syndesmosis**: This is also incorrect as it is a fibrous joint where two bones are linked by a strong membrane or ligaments.
- **D. Symphysis**: This is incorrect as well; it is a fibrocartilaginous joint where the bodies of two bones meet.

6. **Conclusion**: Based on the analysis, the only option that qualifies as a true joint is **A. Synovial joint**.

**Final Answer**: True joints are **synovial joints**.

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