What is osteoporosis?

Explanation

### Step-by-Step Solution:

1. **Definition of Osteoporosis**: Osteoporosis is a medical condition characterized by the weakening and brittleness of bones. This condition results in an increased risk of fractures.

2. **Bone Structure**: In healthy bones, there are small pores that allow for the normal absorption and replacement of bone tissue. However, in osteoporosis, these pores become larger, leading to a significant reduction in bone density and strength.

3. **Bone Remodeling Process**: The body continuously absorbs old bone tissue and replaces it with new bone tissue. In osteoporosis, this process is disrupted, leading to a net loss of bone mass.

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