Final answer:
Connective tissue proper includes loose and dense forms, responsible for support and structure; the former is more flexible, while the latter provides strength and elasticity. Supportive tissue like bone and cartilage offer protection and structure, whereas fluid connective tissues like blood and lymph transport nutrients and cells.
Step-by-step explanation:
Connective tissue proper is a key category of connective tissue, inclusive of both loose connective tissue and dense connective tissue. Loose connective tissue functions in holding organs in place and comprises adipose, areolar, and reticular tissues, with a matrix rich in viscous ground substance and fewer fibers. Dense connective tissue, on the other hand, has a higher fiber density, which imparts tensile strength and elasticity, and it is found in structures such as ligaments and tendons.
Supportive connective tissue, such as bone and cartilage, provides structure and strength, with the cartilage being flexible and bones having a rigid, calcified matrix. Finally, fluid connective tissue includes blood and lymph that have a liquid matrix and circulate throughout the body, carrying nutrients and immune cells.
Together, these various forms of connective tissue proper play essential roles in support, protection, and the structural integrity of the body.