Which two connective tissue cell types are cited as examples?

• A. Adipose and mast cells
• B. Fibroblasts and chondrocytes
• C. Osteocytes and erythrocytes
• D. Lymphocytes and neutrophils

Answer: (A)

Connective tissue is made up of resident cells that stay within the tissue matrix and perform local functions. Adipose cells (adipocytes) are classic residents of adipose tissue, a form of loose connective tissue, where they store fat and contribute to energy storage and insulation. Mast cells are another staple resident cell type in connective tissue; they reside near blood vessels and release mediators like histamine during immune responses, helping coordinate inflammation locally. These two examples are widely cited because they exemplify how connective tissue contains specialized cells embedded in the matrix to support its structural and functional roles. In contrast, cells like chondrocytes live in cartilage, osteocytes in bone, erythrocytes circulate in blood, and lymphocytes or neutrophils are circulating immune cells, not typical resident connective tissue cells.