EXPLANATION OF PLATE II. 



A view of the muscles situated on the front surface of the body 

 seen in their natural position. It must be understood that beneath 

 these muscles many others are situated, which cannot be represented 

 in the figure. 



Muscles of the Face, Head and Neck : 



1. Muscle of the Forehead. This, together with a muscle at the back of 



the head, has the power of moving the scalp. 



2. Muscle that closes the Eyelids. The muscle that raises the upper eyelid 



so as to open the eye is situated within the orbit, and consequently 

 cannot be seen in this figure. 



3. 4, 5. Muscles that raise the Upper Lip and angle of the Mouth. 



6, 7. Muscles that depress the Lower Lip and angle of the Mouth. By the 

 action of the muscles which raise the upper lip, and those that depress 

 the lower lip, the lips are separated. 



8. Muscle that draws the Lips together. 



9. Muscle of the Temple (Temporal Muscle). 



10. Masseter Muscle. 9 and 10 are the two chief muscles of mastication, 



for when they contract the movable lower jaw is elevated, so as to 

 crush the food between the teeth in the upper and lower jaws. 



11. Muscle that compresses the Nostril. Close to its outer side is a small 



muscle that dilates the nostril. 



12. Muscle that wrinkles the Skin of the Neck, and assists in depressing 



the lower jaw. 



13. Muscle that assists in steadying the Head, and also in moving it from 



side to side. 



14. Muscles that depress the Windpipe and Organ of Voice. The muscles 



that elevate the same parts are placed beneath the lower jaw, and 

 cannot be seen in the figure. 



Muscles that connect the upper extremity of the trunk. Portions 

 of four of these muscles are represented in the figure, viz. : 



15. Muscle that elevates the Shoulder (Trapezius Muscle). 



17. Great Muscle of the Chest, which draws the Arm in front of the Chest 



(Great Pectoral Muscle). 



18. Broad Muscle of the Back, which draws the Arm downwards across the 



back of the Body (Latissimus Dorsi). 



19. Serrated Muscle, which extends between the Ribs and Shoulde.r blade, 



and draws the Shoulder forwards and rotates it, a movement which 

 takes place in the elevation of the arm above the head (Serratus 

 magnus). 



At a lower part of the trunk, on each side, may be seen the large 

 muscle which, from the oblique direction of its fibres, is called 



20. Outer Oblique Muscle of the Abdomen. 



