Which type of connective tissue includes cartilage, bone, and blood?

The correct choice is specialized connective tissue because this category encompasses connective tissues that have unique structures and functions distinct from those of connective tissue proper. Specialized connective tissues include cartilage, which provides flexibility and support at joints; bone, which offers a rigid framework for the body; and blood, which plays critical roles in transportation and immune response. Each of these tissues is adapted for specific functions unlike the more general types of connective tissues, such as connective tissue proper, loose connective tissue, and dense connective tissue.

Connective tissue proper mainly consists of fibers and ground substance, serving as a supportive framework, while loose connective tissue primarily provides cushioning and support for other tissues. Dense connective tissue, characterized by tightly packed fibers, is mainly found in tendons and ligaments. Therefore, the inclusion of cartilage, bone, and blood in the category of specialized connective tissues highlights their particular roles and structure compared to the other types.