180 



////: MI >/./:>. 



Fig. 98. 



1. Tendons may pass in the same din . tion as tho muscular fibres. Thin 

 is the most simple manner. But tho muscle may be divided into two bodies 

 or bellies by a middle tendon ; it is then called a diijnxtric nmsele. 



2. Muscular fasciculi, passing altogether from tho same side to become 

 united into a tendinous cord, constitute a semi-penniforrii muscle. 



3. Muscular fasciculi may bo implanted to right and left of the tendon, 

 and form a pmnatwl or penniform muscle. 



" This arrangement of fibres demonstrates that tho length of tho muscle, 

 tho length of its belly, and the length of its muscular fibres, should bo care- 

 fully distinguished. The first term is applicable to tho whole of the liusclo, 

 tho tendon included ; tho second, to the fleshy body of tho muscle, with the 

 exception of the tendon ; the third, to tho muscular fasciculi constituting 

 this fleshy body : tho latter idea is tho most important, for it alone indicates 



tho amount of contraction a muscle is sus- 

 ceptible of, and consequently tho possible ex- 

 tent of movement it is capable of effecting."- 

 Beaunis and Bouchard. 



G. VESSELS AND NERVES. Tho muscular 

 tissue receives much blood ; the fibrous tissue 

 very little. The arteries are large, numerous, 

 and each is acccompanied by two veins. The 

 capillary vessels anastomose in such a manner 

 us to form rectangular meahes, whose greatest 

 diameter is directed towards the length of tho 

 muscle. 



The lymphatic vessels of the muscles are 

 few ; they sometimes penetrate their interior in 

 following the capillaries ; at other times they remain on the surface, in tho 



external perimysium. The exist- 



Fig. 99. ence of lymphatics has not yet been 



demonstrated in tendons, aponeu- 

 roses, or synovial membranes. 



The nerves emanate from tho 

 cerebro-spinal centre. At their 

 terminal extremity they offer a 

 small enlargement, called by 

 Rongct the terminal motor j>/nl<'. 

 and by Doyere and Kiihne tho ner- 

 vous colline (hillock). It is ad- 

 mitted that the motor tube traverses 

 the sarcolemma, losing its enve- 

 lope ; and that tho substance of the 



WITH FOUR i>AUK-noiu>i;iu:i> KiiiKKs (u) CROSS- cylinder is spread over the surface 

 ING ITS SURFACE; after Bc.tl,-. o f the muscular fibrilhe to form the 



6, Capillary blood-vessel, with fine nerve-fibres; mo tor plate or nervous colline. 

 a few only of the transverse markings of the 



muscle are represented ; c, Two of the dark- PHYSICO-CHEMICAL PROPERTIES OF 

 bordered nerve-fibres passing over the ele- cTiiTnr-r* nrrmnrr-a 



. . ,. . ... i . ,. O1K11H.IJ j>lUadr,N. 



mentary fibre to be distributed to adjacent 



fibres. This arrangement, in which a dark- Muscles are soft organs, re- 



bordered nerve-fibre, distributed to muscle, ma rkablo for their more OF less 



DISTRIBUTION OF CAPILLARIES 

 IN MUSCLE. 



I-OHTION OF AN III.KMI.NJAHV MrsiTI.AI! 



u ,.. .. 



muscle, is frequent. Magnified 700 diameters. tlic species, and oven m these with 



the ago and health of the animals. 



