Arkansas Esthetician Practice Exam 2026 - Free Esthetician Practice Questions and Study Guide

Cartilage plays a vital role in the human body, particularly in the musculoskeletal system. It is a flexible connective tissue found in various areas, providing support and cushioning in joints. Specifically, it lines the ends of bones in joints, allowing for smooth movement and reducing friction between the bones during physical activity. This structure is crucial for maintaining the health and function of the joints, helping to absorb shock and distribute weight evenly.

The other options pertain to structures in the body that do not typically feature cartilage. The heart is lined with a different type of tissue called the pericardium and does not utilize cartilage in its structure. The brain is protected by bone and membranous structures, not cartilage, while the kidneys are surrounded by a layer of fat and connective tissue, lacking cartilage as a protective or supportive structure. Therefore, the correct answer highlights the specific role of cartilage in joint function.