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THE ANIMALS AND MAN 



slightly. It is now contracted. Fig. 173 shows this muscle 

 in both relaxed and contracted position. A muscle like the 



Fig. 172, Superficial muscles of trunk, shoulder and back viewed from 

 behind. A, external occipital protuberance; 1-1, trapezius muscles; 

 1' oval tendon between right and left trapezius; V insertion of trapezius; 

 B, summit of shoulder (acronium) ; 2-2', lateral muscle and insertion; 3, 

 sterno-mastoid ; 4, deltoid; S, infraspinatus; 6, teres minor; 7, teres 

 major; 8, rhomboideus major; 9, part of external oblique muscle of 

 abdomen. (After Allen Thomson.) 



biceps is attached to two bones by strong white elastic cords 

 or tendons. One of the attachments serves as a fixed point 



