FUNDAMENTAL PRINCIPLES OF ANATOMY. 21 



77/6' mouth has roof, floor, sides, openings, dental arches. 



The tympanum has roof, floor, and four walls. 



Hunter's canal has roof, floor, boundaries, and extremities. 



Scarpds triangle has roof, floor, base, apex, boundaries. 



The iscldo-rcctal fossa has base, apex, walls, sacral and pubic ends. 



The thorax has apex, base, anterior, posterior, and lateral walls. 



Inguinal canal has rings, roof, floor, and two walls. 



Popliteal space has roof, floor, extremities, and boundaries. 



SUBSTANTIVE ADJECTIVES. These are so frequently used that I wish the 

 student early to learn to supply the missing substantive, not only in the case of 

 muscles, as referred to in nomenclature, but also in the case of arteries, veins, 

 nerves, and lymphatic glands. In social life, after long and thorough acquaintance 

 with your fellows, you justifiably dub your friends John, James, and the like, the 

 while mindful of the full baptismal name ; these liberties of address you would 

 consider improper in addressing comparative strangers. Likewise in anatomy 

 you speak of structures as follows : 



i. A FRIEND. 2. A STRANGER. 



The radial artery or vein Arteria radialis or vena radialis. 



The ulnar artery or vein, Arteria ulnaris or vena ulnaris. 



The brachial artery or vein, Arteria brachialis or vena brachialis. 



The femoral artery or vein Arteria femoralis or vena femoralis. 



The hepatic artery or vein, Arteria hepatica or vena hepatica. 



The splenic artery or vein, Arteria splenica or vena splenica. 



The vertebral artery or vein, .... Arteria vertebralis or vena vertebralis. 

 The mesenteric artery or vein, .... Arteria mesenterica or vena mesenterica. 



The lingual artery or vein Arteria lingualis or vena lingualis. 



The facial artery or vein, Arteria facialis or vena facialis. 



Lymphatic Glands. 



Cervical gland, Glandula lymphatica cervicalis. 



Mesenteric gland, Glandula lymphatica mesenterica. 



Inguinal gland, Glandula lymphatica inguinalis. 



Axillary gland, Glandula lymphatica axillaria. 



Epitrochlear gland, Glandula lymphatica epitrochlearis. 



Nerves. 



Radial, Nervus radialis. 



Ulnar Nervus ulnaris. 



Femoral, Nervus femoralis. 



Lingual, Nervus lingualis. 



Facial, Nervus facialis. 



Circumflex Nervus circumflexus. 



Great sciatic, Nervus sciaticus magnus. 



Sympathetic, Nervus sympatheticus. 



Remember, arteries, nerves, veins, lymphatics, and muscles are spoken of, 

 the country over, in the adjective abbreviated form by those who know what 

 they are talking about ; you, however, are not to speak of these structures in 

 the abbreviated form until you are familiar with the classical name. After such 

 knowledge has been acquired, then ahvays be governed by usage. 



LAW OF PROJECTILES. In anatomy and physiology, in obstetrics and surgery, 

 in therapeutics and chemistry, we must frequently invoke a reason for the location 

 of a nerve or vessel ; for the direction taken by pus or a bullet ; for a misplaced 

 foetal head in utero ; or for the tracts pursued by pain and motion, when these 

 manifestations are far removed from their logical locality. The above pain, pus, 



