1 Boils are infected hair follicles that look like red, raised bumps on the skin. They can be painful, but they eventually go away once they burst and release fluid.  Cold sores are red, fluid-filled bumps that form around the mouth or other areas of the face, which can burst.
The osteoclasts are a type of bone cells. The bone cells are found within the bone tissues, and they are responsible for the make-up of the skeleton of vertebrates. The four main types of bone cells are the (1) osteoclasts, (2) osteoblasts, (3) osteocytes, and (4) lining cells. The osteoclasts, in particular, are large, multinucleated cells that are involved in the absorption and removal of bone, particularly dissolving the fibers and the matrix of bone.
Definition of spheroplast. : a bacterium or yeast cell that is modified (as by enzymatic action) so that there is partial loss of the cell wall and increased osmotic sensitivity.