The major constituent of connective tissue is
A
Lipid
B
Carbohydrate
C
Cholesterol
D
Collagen
Correct Answer: Collagen
Unlike the other tissue types (epithelium, muscle, and nerve), which consist mainly of cells, the major constituent of connective tissue is the extracellular matrix (ECM). Extracellular matrices consist of different combinations of protein fibers (collagen and elastic fibers) and ground substance.