74 The Anatomy of a HOVx.S'E. Chap.V. 



©f the Os Ikun:^ near the great Procefs of the Thigh-bone, 

 and covering the whole Thigh and the Stifle, over which 

 it croiies, it is at lall: inferted into the fore and upper Part of 

 the Bone of the Leg. Its Ufe is to extend the Leg diredtly ; 

 or, according to fome, to draw it obliquely outwards. 



The fecond is call'd Longui, arifing from the upper 

 Part of the Appendix of the Os Ileum ; and pafling ob- 

 liquely down the Thigh, it is inferted into the Bone of 

 the Leg, a little below the Stifle. This Mufcle not only 

 extends the Leg, but alfo helps to draw it inwards ; for 

 which Reafon, fome Authors reckon it one of the Benders 

 of the Leg. 



The third is call'd Re^us, from its ftreight Courfe : It 

 takes its Beginning from the lower Brim of the Haunch- 

 bone, and defcends ftreight down theForehde of the Thigh, 

 until it reaches the Stifle, where it turns into a ftrong and 

 broad Tendon ; and adhering to the Patella, in its Paf- 

 fage over it, it is at laft inferted into the Forefide of the 

 upper Part of the Shank. 



The fourth is named Fajlus Externus, becaufe of its 

 great Bulk ; it arifes from the Root of the great Trochan- 

 ter, and from the Neck of the Thigh-bone, cleaving clofe 

 to its outfide, until it arrives at the Stifle, where, becoming 

 membranous and broad, and uniting with the Tendon of 

 the ftreight Mufcle, it is inferted into the fame Place with 

 it, but on its outfide. 



The laft, or Va^us Internus, rifes from the Root of 

 the lefTer Trochanter, and defcending down the Inlide of 

 the Thigh-bone, it unites itfelf with the former two, after 

 it has pafied over the Stifle, and is inferted with them into 

 the fame Place of the Tibia. Thefe three laft defcribed Muf- 

 cles, joining together at their crofling the Stifle, form one 

 broad and ftrong Tendon, which involves the Patella, or 

 Knee-bone of the Stifle, and ties it fo firmly, that it is 

 almoft impoflible for it to be difplaced. 

 Bend dh fo r '^^^ Benders of the Legs are in Number 

 * four, viZ' the Biceps, the SemimembranofuSy 

 the Seminervcfus, and Gracilis, 



The Biceps rifes fharp and nervous from the Appen- 

 dage of the Coxendix, and pafiing along the Outfide of 

 the Thigh, is inferted into the Outfide of the appendix 

 of the Tibia, or Leg- bone j this bends the Leg, by puU 

 Jing it backward. 



The 



