Category: O

The branch of chemistry dealing with substances that contain carbon compounds. The study of substances that contain the element carbon.  

The site or sites in bones where calcification begins and bone replaces fibrous connective tissue or cartilage. The region of bone formation at the center of the body of a long bone is called the primary (diaphyseal) ossification center. Most secondary ossification centers are found in the epiphyses.  

Cellulose that has been oxidized and is made to resemble cotton or gauze. It is used to arrest bleeding by direct application to the site of hemorrhage.  

A cell of the olfactory mucosa that has receptors for the sense of smell. Olfactory cells are continuously replaced from stem cells throughout adult life.  

A cell that produces dentin and is responsible for the sensitivity of and metabolism of dentin in the tooth.  

A cataract in which the lens solidifies and shrinks. This stage follows the mature stage.  

A poorly differentiated tumor of the bronchus that contains small oat-shaped cells.  

The cartilaginous capsule that develops in the embryonic skull to enclose the eye.  

Squamous cell carcinoma of the mouth or tongue. Oral cavity cancers are only rarely caused by salivary gland tumors or sarcomas.  

An opening in the obturator membrane of the hip bone that transmits the obturator vessels and nerve.