Identify the correct the statement

Options

A. All amphiarthroses are fibrous joints
B. All synovial joints are amphiarthroses
C. All cartilaginous joints are synarthroses
D. All sutures are synarthroses

Answer

To identify the correct statement among the given options regarding types of joints and their movements, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- The first statement claims that "all amphiorithros are fibrous joints."
- This statement is incorrect because amphiorithros are actually cartilaginous joints, not fibrous joints.
- Cartilaginous joints allow limited movement, which is a key characteristic of amphiorithros.

2. **Evaluate the Second Statement:**
- The second statement claims that "all synovial joints are amphiorithros."
- This statement is also incorrect. Synovial joints are classified as diarthroses, which allow for full movement.
- Amphiorithros, on the other hand, allow only limited movement.

3. **Evaluate the Third Statement:**
- The third statement claims that "all cartilaginous joints are synnarithros."
- This statement is incorrect as well. Cartilaginous joints are part of amphiorithros, while synnarithros are characterized by fibrous joints that allow no movement.

4. **Evaluate the Fourth Statement:**
- The fourth statement claims that "all sutures are synnarithros."
- This statement is correct. Synnarithros refers to joints that allow no movement, and sutures, which are found in the skull, are examples of such joints.
- Therefore, this statement is accurate.

### Conclusion:
The correct statement among the options provided is the fourth statement: "All sutures are synnarithros."