Which of the following statements is incorrect regarding human skeleton?

Options

A. It consists of skull, backbone, ribcage and bones of limbs.
B. It consists of 206 bones in an adult woman.
C. All the bones present in it are of same size and shape.
D. It provides shape and support to our body.

Explanation

To determine which statement is incorrect regarding the human skeleton, let's analyze each statement step by step.

1. **Statement 1: It consists of skull, backbone, rib cage, and bones of limbs.**
- This statement is correct. The human skeleton is made up of various parts, including the skull (which protects the brain), the backbone (or vertebral column), the rib cage (which protects the heart and lungs), and the bones of the limbs (arms and legs).

2. **Statement 2: It consists of 206 bones in an adult human.**
- This statement is also correct. An adult human skeleton typically has 206 bones. This number can vary slightly due to variations such as extra bones (accessory bones) or fused bones.

3. **Statement 3: All the bones present in it are of the same size and shape.**
- This statement is incorrect. The bones in the human skeleton vary greatly in size and shape. For example, the femur (thigh bone) is much larger than the bones in the fingers, and the skull bones have different shapes to accommodate the brain and facial features. The diversity in bone size and shape is crucial for the different functions they perform in the body.

4. **Statement 4: It provides shape and support to our body.**
- This statement is correct. The skeleton provides the necessary structure and support for the body, allowing us to maintain our shape and posture. It also protects vital organs.

Based on the analysis, the incorrect statement regarding the human skeleton is **Statement 3**: "All the bones present in it are of the same size and shape."

### Summary of the Solution:
- Statement 1: Correct
- Statement 2: Correct
- Statement 3: Incorrect (this is the answer)
- Statement 4: Correct