D. Connective tissue cells. Loose connective tissue contains a variety of cell types. Those that will be considered in this lecture include: (1) endothelial cells, (2) pericytes, (3) fibroblasts, (4) macrophages, (5) plasma cells, (6) mast cells, and (7) fat cells.
niche noun [ C ] (POSITION) âº a job or position that is very suitable for someone, especially one that they like: He has carved/made a niche for himself as a financial advisor. âº an area or position that is exactly suitable for a small group of the same type: an ecological niche.
A niche is a role that a population has and a habitat is where the populations live and interact with each other. Read more: http://wiki.answers.com/Q/What_is_the_different_bâ¦etween_an_organism's_habitat_and_its_niche#ixzz20jIRdjXw.