Although the word chondroblast is commonly used to describe an immature chondrocyte, the term is imprecise, since the progenitor of chondrocytes (which are mesenchymal stem cells) can differentiate into various cell types, including osteoblasts
choanocyte. n. 1. (Zoology) any of the flagellated cells in sponges that maintain a flow of water through the body. A collar of protoplasm surrounds the base of the flagellum. Also called: collar cell.
Langerhans cells are monocytes within the epidermis that recognise and process small molecules penetrating the skin surface. These antigen-presenting cells are identified in tissue sections by characteristic surface markers. Pigment cells in the basal layer (melanocytes) protect the skin from ultraviolet radiation.