52 ANATOMY FOR NURSES [Chap. V 



jections are called processes. The depressions are called fossae 

 or cavities, and either a qualifying adjective is used to describe 

 them, or a special name given to them. Processes and depressions 

 are classified as : 1. Articular, 2. Non-articular. The articular are 

 provided for the mutual connection of bones to form joints. The 

 non-articular serve for the attachment of ligaments and muscles. 

 The following terms are used : — 



Prucc.ss. — Any marked bony prominence. 



Tuberosity. — A large process. 



Tubercle. — A small process. 



Syinous. — A sharp, slender process. 



Cre^t. — A narrow ridge of bone. 



Condyle. — A rounded or knuckle-like process. 



Head. — A portion supported on a constricted part or neck. 



Fossa. — A depression in or upon a bone. 



Cavities. — The terms sinus ' and antrum are applied to cavities 

 within certain bones. 



Meatus or Canal. — A long tube-like passageway. 



Fissure. — A narrow slit. 



Foramen. — A hole or orifice through which blood-vessels, 

 nerves, and ligaments arc transmitted. 



DIVISIONS OF THE SI^LETON 



In taking up the various divisions of the skeleton, we will 

 consider it as consistins: of — 



1. Head or skull 



2. Ilyoid. 



3. Trunk . . 



Cranium. 

 Face. 



Vertebrae. 

 Sternum. 

 I Ribs. 



4. Upper extremities. 



5. Ix)wer extremities. 



The head or skull. — The head or skull rests upon the spinal 

 column, and is formed by the union of the cranial and facial 

 bones. It is divisible into — 1. Cranium or brain case, and 

 2. Anterior region, or face. 



' The term "sinus " is also used in surgeiy to denote a narrow tract leading from 

 the surface down to a cavity. 



