Other types of raised skin bumps can be caused by skin cancer. There are several types of skin cancer, all requiring medical management and treatment: Actinic keratosis is a precancerous skin condition characterized by scaly, crusty spots on areas of sun-exposed skin, such as hands, arms, or face.
osteocyte[osâ²tÄ-Å-sÄ«tâ²] Type:Term. Definitions. 1. A cell of osseous tissue that occupies a lacuna and has cytoplasmic processes that extend into canaliculi and make contact by means of gap junctions with the processes of other osteocytes.
Osteoblasts are bone-forming cells, have an extensive endoplasmic reticulum and numerous ribosomes. Ossification is the formation of bone by osteoblasts. Osteocytes become surrounded by bone matrix and are relatively inactive, but do have the capability to produce components needed to maintain the bone matrix if needed.