Biology · Support and Movement

The correct answer is Cartilage, as it is a type of connective tissue that is completely avascular, meaning it does not contain blood vessels. This lack of blood supply significantly slows down its healing process when injured.

In contrast, Bone is a highly vascular tissue and heals relatively quickly due to its abundant blood supply. Adipose tissue, or fat, is also well-vascularized, allowing for efficient healing. Similarly, Areolar tissue is a loose connective tissue rich in blood vessels, which supports rapid healing. Therefore, these options do not meet the criteria of being avascular and healing slowly.

Bone is a highly vascular tissue that heals relatively quickly due to its rich blood supply, which aids in the repair process.

Cartilage is an avascular connective tissue, meaning it lacks blood vessels. This avascularity contributes to its slow healing process, as nutrients and waste removal rely on diffusion from surrounding tissues.

Adipose tissue, or fat tissue, is vascularized and has a relatively good blood supply, which supports faster healing compared to avascular tissues.

Areolar tissue is a loose connective tissue that is well-vascularized, providing it with adequate blood flow for healing and repair.