What is the primary function of cartilage in the body?

The primary function of cartilage in the body is to form a cushion and provide tough tissue that supports various structures. Cartilage is a flexible connective tissue that serves multiple important roles, including acting as a shock absorber at joints to reduce friction and allow for smooth movement. It also provides structure and support in areas like the nasal passages, ears, and the rib cage, and is essential in the development of the skeletal system during growth.

In joints, cartilage covers the ends of bones, allowing them to glide over each other with minimal friction. This cushioning effect is vital for preventing damage to the underlying bone and maintaining joint health. Additionally, because cartilage does not contain blood vessels, it relies on surrounding tissues for nutrients and waste removal, highlighting its specialized function that differs from other types of connective tissues.

The other options focus on various functions that other tissue types perform or attributes that do not primarily define cartilage. For example, cartilage does not provide blood supply (as some tissues like bone do) or connect muscles to bones (which is the function of tendons). While cartilage does support bone growth in the form of growth plates during development, its primary role is more specifically related to cushioning and structure.