Which of the following cartilage is considered the firmest type of connective tissue?

Hyaline cartilage is known for being the firmest type of connective tissue, providing both support and flexibility in various parts of the body. It is composed of a dense network of collagen fibers that are fine and provide a smooth surface for joint movement while also contributing to the resilience of the cartilage. This type of cartilage is found in many areas, including the embryonic skeleton, costal cartilages (which connect ribs to the sternum), and at the ends of long bones where it reduces friction in joints.

In contrast, elastic cartilage is more flexible, containing a higher proportion of elastic fibers, which allows it to maintain shape while being able to bend. This type is found in structures such as the ear and the epiglottis. Fibrocartilage, while tough and able to withstand compressive forces, has a different composition, containing more collagen fibers which gives it great tensile strength but makes it less firm than hyaline cartilage. Articular cartilage, though important for joint function, is not a distinct type itself but rather a location of hyaline cartilage at the ends of bones in synovial joints. Thus, hyaline cartilage stands out as the firmest type of connective tissue overall.