THE Mi'SCLES 



53 



f VOLUNTARY 



^FTFTAL MUSCLK 

 SKELETAL. (Striated or 



I Striped.) 



TOPICAL OUTLINE 



Under the control of the will. 



Composed of bundles of fibres. 



These bundles composed of smaller 

 bundles (fasciculi), visible to the 

 unaided eye, and surrounded by 

 sheaths. 



Fasciculi composed of fibres. Average 

 diameter about B 5o in. 



Fibres made up of minute fibrillx 

 (fibrils). 



Fibrillae composed of disk-like- bodies, 

 and consequently striated trans- 

 versely. 



Grouped bi-laterally and in pairs. 



Attached to bones by tendons or di- 

 rectly. 



I Not under the control of the will. 

 Found chiefly in the muscular walls 

 juuov^c.. of the internal organs and vessels. 



(Non-striated or 1 Fibres composed of elongated cells 

 Unstriped.) with pointed ends, not marked trans- 



L versely. 



Involuntary, yet striped or striated. 

 Striated longitudinally as well as 



transversely. 

 Fibres composed of oblong and 



branched cells. 



III. USES motion ; shape ; protection ; hold bones in place. 



IV. HYGIENE nourishment from blood; exercise: rest; effects of alcohol 



on strength ; endurance, structure. 



VISCERAL. 



MUSCLES OF 

 THE HEART. 



TABLE OF THE PRINCIPAL MUSCLES 

 (SEE FIGURE 11, PAGE 32) 



The Head 



Oc-cip'i-to fron-ta'lis, moves the scalp and eyebrows. 



Or-bic-u-la'ris pal'pe-brae, closes the eye. 



Le-va'tor pal'pe-brae, opens the eye. 



The Recti muscles (four in number) move the eyeball. 



Tem'po-ral, 



Mas-se'ter, 



raise the lower jaw. 



The Neck 



Pla-tvs'ma My-oi'des, { moye ^ head forwards . 



Ster'no Mas toid, 



Sca-le'ni muscles move the neck from side to side. 



