8 4 



ANATOMY AND PHYSIOLOGY 



Exception. The heart: which acts whether we will or not, although its 

 muscle is striated. 



In most cases the connective tissue is prolonged beyond the 

 muscle into a white cord or band called a tendon, if the muscle is 

 long and thick; or into a broad thin layer called an aponeurosis if 

 the muscle is flat; and by these tendons and aponeuroses the 



FIG. 72. SHOWING EXTREMITIES OF 

 MUSCLES. 2, Tendqn. 5, Aponeuro- 

 sis. (Sappey.) 



FIG. 73. INTERCOSTAL MUSCLES. 

 (Morris.} 



muscles are attached to bones and other organs. Sometimes the 

 red fibers are attached directly to the parts which they move, but 

 in by far the greater number the tendons are conspicuous (Fg. 72). 

 Muscles are described as consisting of a body and two ex- 

 tremities; the body or belly being the red contracting part which 

 swells in action, while tendons (which are possessed by most of the 



