Saddle joint is present between

Options

A. Radius and ulna
B. Carpals
C. Carpal and metacarpal of thumb
D. Ulna and humerus

Answer

**Step-by-Step Solution:**

1. **Understanding Saddle Joint**: A saddle joint, also known as a sellar joint, is a type of synovial joint where the opposing surfaces are reciprocally concave and convex. This unique structure allows for a wide range of motion.

2. **Identifying Locations of Saddle Joints**: Saddle joints are found in specific areas of the body. Notable locations include the thumb, thorax, middle ear, and heel. However, the most significant saddle joint in terms of mobility is located in the thumb.

3. **Focusing on the Thumb**: In the thumb, the saddle joint is specifically formed between two bones: the carpal bone (specifically the trapezium) and the metacarpal bone of the thumb (the first metacarpal). This joint allows for the thumb's unique range of motion, including opposition.

4. **Conclusion**: Therefore, the saddle joint is present between the carpal and metacarpal of the thumb.

**Final Answer**: The saddle joint is present between the carpal and metacarpal of the thumb.

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