Question

what type of cell is always found in connective tissue proper?
fibroblasts
lymphocytes
microphages
mast cells

Explanation:

Fibroblasts are the most common cells in connective tissue proper. They produce fibers and ground substance. Lymphocytes are mainly in lymphoid tissues. Microphages are phagocytic cells that can be in various tissues but not always in connective tissue proper. Mast cells are present in connective tissue but not as always - present as fibroblasts.

Answer:

fibroblasts