**Question:** Which of the following about menisci is not true? NOT RELATED - ANATOMY

A. The menisci are avascular cartilage structures that provide shock absorption and stability to the knee joint.
B. The medial meniscus is larger than the lateral meniscus.
C. The menisci are composed of hyaline cartilage, similar to the articular cartilage of the joint surface.
D. The menisci are essential for maintaining joint space narrowing with age.

**Correct Answer:** D. The menisci are essential for maintaining joint space narrowing with age.

**Core Concept:** Menisci are essential components of the knee joint, playing a crucial role in providing shock absorption, stability, and support to the knee joint. They are avascular cartilage structures, meaning they do not have a direct blood supply, relying on diffusion of nutrients from the surrounding joint fluid.

**Why the Correct Answer is Right:** The correct answer is not related to the menisci's role in maintaining joint space narrowing with age. Menisci primarily contribute to the knee joint's stability, shock absorption, and distribution of forces across the joint surface. Their avascular nature prevents excessive wear and tear, allowing them to withstand high-stress conditions.

**Why Each Wrong Option is Incorrect:**

A. This statement is true, as the menisci serve as shock absorbers and help distribute the forces applied to the joint during activities like walking, running, and jumping.
B. Although the medial meniscus is usually larger than the lateral meniscus, this statement is not incorrect in generalizing the size difference between the menisci.
C. Menisci are composed of hyaline cartilage, which is the same type of cartilage found on the articular surfaces of the femur and tibia, allowing for smooth joint movement. This statement is accurate regarding the menisci's composition.

**Clinical Pearl:** Understanding the functions of the menisci is crucial for understanding knee joint biomechanics, diagnosing meniscus injuries, and formulating appropriate treatment plans. A thorough knowledge of meniscus anatomy, physiology, and pathology is essential for medical professionals.