Human vertebral column has

Options

A. Four curves
B. No curves
C. Three curves
D. Two curves.

Answer

**Step-by-Step Solution:**

1. **Understanding the Vertebral Column**: The human vertebral column, also known as the spinal column or spine, is a crucial structure in the human body. It provides support and flexibility and protects the spinal cord.

2. **Structure and Function**: The vertebral column is a bony structure that is strong and flexible. It plays a vital role in maintaining an erect posture and protecting the spinal cord.

3. **Shape of the Vertebral Column**: The vertebral column is not a straight line; instead, it has a curvy structure resembling the letter "S". This curvature is important for the distribution of weight and balance.

4. **Types of Curves**: There are two types of curves in the vertebral column:
- **Primary Curves**: These are the curves present during embryonic development in the uterus.
- **Secondary Curves**: These develop after birth as the individual grows and begins to walk.

5. **Identifying the Curves**: The vertebral column has four main curves:
- **Cervical Curve**: Located in the neck region.
- **Thoracic Curve**: Located in the upper back.
- **Lumbar Curve**: Located in the lower back.
- **Sacral Curve**: Located in the pelvic region.

6. **Total Number of Curves**: In total, there are four curves present in the human vertebral column.

**Final Answer**: The human vertebral column has a total of **4 curves**.

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