The joint where synovial cavity is absent

Options

A. carpals
B. finger and toes in males
C. pubic symphysis in females
D. femur and pelvis in females

Answer

### Step-by-Step Solution:

1. **Understanding Synovial Cavity**:
- The synovial cavity is a space filled with synovial fluid, which lubricates joints, allowing for smooth movement. It is typically found in synovial joints, which are freely movable.

2. **Identifying Joint Types**:
- There are different types of joints in the human body:
- **Synovial Joints**: These have a synovial cavity and are freely movable (e.g., knee, elbow).
- **Cartilaginous Joints**: These joints do not have a synovial cavity and allow limited movement (e.g., pubic symphysis).
- **Fibrous Joints**: These joints also lack a synovial cavity and are mostly immovable (e.g., sutures in the skull).

3. **Analyzing the Options**:
- **Option 1: Carpals**: These are synovial joints (intercarpal joints) and have a synovial cavity.
- **Option 2: Fingers and Toes in Males**: These joints (phalangeal joints) are also synovial joints with a synovial cavity.
- **Option 3: Pubic Symphysis in Females**: This is a cartilaginous joint, which means it does not have a synovial cavity.
- **Option 4: Femur and Pelvis in Females**: This joint (hip joint) is a synovial joint and has a synovial cavity.

4. **Conclusion**:
- The only joint listed that does not have a synovial cavity is the **pubic symphysis in females**. Therefore, the correct answer is **Option 3**.