Page:Life in Motion.djvu/37

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MUSCLES
17

when he is training for throwing the cricket ball, or for rowing, he feels his stiff and firm biceps with a certain amount of commendable pride. A young lady has a biceps also;

Fig. 6.—Muscles of frog's leg. g, c, the gastrocnemius muscle often used in physiological experiments.

but she is not so much interested in its welfare. In a section of a limb, such as you find at any butcher's stall, you see the masses of red flesh imbedded in fat and loose tissue. These masses of red flesh are the