238 DETAILED SYNTHESIS. 



smaller bundles, and are enclosed by a sinewy membrane 

 somewhat thicker than that of the fasciculus, and this 

 may be a muscle. These bundles may be again made 

 up and enclosed in a still thicker sinewy membrane, 

 while several muscles themselves may also be surrounded 

 by an enclosing membrane, called a fascia. Sinewy 

 fibres are also woven among the bundles in the form of 

 areolar texture. 



449. Illus. THE MUSCLES OF THE THIGH are enclosed in a'dbmmon 

 external sheath or fascia beneath the skin, and bundle within bundle of the 

 constituents of the thigh can be analyzed till the ultimate cellular fibrillae, 

 composed of albuminous membrane and contractile musculine, is reached. 



450. AROUND THE FIBEILL^:, but not entering them, 

 is woven a beautiful network of very fine capillaries that 

 communicate with arteries on one hand and veins on the 

 other, so that a plentiful supply of Blood is constantly 

 poured around the contractile elements of the muscle. 



451. UPON OR IN THE SHEATHS OF THE FIBRILLAE 



nerves terminate and commence, precisely how is not 

 known ; some suppose by loops and others by points. 



452. Through SOME OF THE NERVES, CALLED MOTOR, 

 influences are brought to the contents of the fibrillar 

 sheath that causes them to contract, and through OTHER 

 NERVES, CALLED SENSORY, influences are sent to the ner- 

 vous centres, causing sensations and other effects. 



453. THE SHEATHS OF SOME OF THE FASCICULI extend 

 but a little distance beyond their contents and produce 

 very short tendons, while in other cases they extend and 

 are condensed in the form of long tendons. 



454. THE CONTENTS OF THE FASCICULI are of nearly 

 equal lengths in some muscles, making their ends abrupt, 

 while in others the contents are very unequal in length, 

 producing a tapering muscle. 



455. THE FIBRES OF THE FASCICULAR SHEATHS are 

 woven diagonally to their contents, but where they ex- 



449. What said of - ? 450. What IB ? 451. What is ? 452. What said - ? 

 458. What said ? 454. What said of ? 455. What said of ? 



