Final answer:
Connective tissue is classified into three categories: connective tissue proper, supportive tissue, and fluid tissue. The basic features of connective tissue include variety of cell types, protein fibers, and a ground substance. Fibroblasts are the most abundant cell type in connective tissue proper.
Step-by-step explanation:
Basic Features of Connective Tissue
Connective tissue can be classified into three broad categories: connective tissue proper, supportive tissue, and fluid tissue. Connective tissue proper includes loose connective tissue and dense connective tissue, which both have a variety of cell types and protein fibers suspended in a viscous ground substance. Supportive tissue, such as bone and cartilage, provides structure and strength to the body. Fluid tissue includes lymph and blood, which contain various specialized cells circulating in a watery fluid.
Cell Types of Connective Tissue
The most abundant cell type in connective tissue proper is the fibroblast, which secretes polysaccharides and proteins to produce a viscous ground substance. Fibrocytes, a less active form of fibroblasts, are also present. Other cell types in connective tissue include adipocytes (in adipose tissue), chondrocytes (in cartilage), and osteocytes (in bone).