What structures are involved in the knee injury called torn cartilage?

Explanation

**Step-by-Step Solution:**

1. **Identify the Knee Structure**: The knee joint is formed by the connection between the femur (thigh bone) and the tibia (lower leg bone). The patella, commonly known as the kneecap, is also involved in this joint.

2. **Understand the Role of Cartilage**: Within the knee joint, there are structures known as menisci, which are crescent-shaped cartilaginous discs. These are crucial for the proper functioning of the knee.

3. **Define Menisci**: The menisci are two wedge-shaped pieces of cartilage located between the femur and tibia. They provide cushioning and support to the knee joint.

...