File:Anatomy, physiology and hygiene (1900) (14592546257).jpg

Identifier: anatomyphysiolog00walk (find matches)
Title: Anatomy, physiology and hygiene
Year: 1900 (1900s)
Authors: Walker, Jerome, 1845-
Subjects: Physiology Health
Publisher: Boston, Allyn and Bacon
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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force of the muscle is directed is its insertion.But many muscles may be made to act from either extremity. In themuscles of the face, one end is attached to bone, the other to movable skin. 3 In childhood the fleshy portions of muscles ait relatively long andthe tendons short. As we grow older, the tendons are relatively longer,and the active fleshy portions less in amount. Hence, to excel in athleticsports, it is needful to begin practising early in life. A baby can readilyput its feet in its mouth, or when sitting en a bed with the legs at rightangles with the body, can easily lift the legs to an acute angle with thetrunk,—a feat that is impossible with an adult.* 4 The tendon of one of (he muscles that move the eye passes througha loop or pulley. A tendon under the jaw passes through a slit in the 54 MUSCLES. —FAT. would be the wrists and ankles, and how clumsy theirmovements, if the muscular tissue were extended throughthose parts (a). The largest and strongest tendon in the
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Fig. 25.Muscles of Left Hand. Front surface. FCC, flexor of ulnar side of the wrist. FCR, flexor of radial side of wrist. SH, sheath of connective tissue through which the tendons pass.OP. the opposing muscle of thumb.ABP, muscle that draws the thumb out- ward.FBP, the short flexor of the thumb. ADP, adductor that draws the thumb in-wards. S of T, sheath of tendon in position, removedfrom other fingers to show the arrange-ment of tendons. FS, long, superficial flexor of the fingers. FP, the long, deep flexor of the fingers. AMD. muscle that pulls the little fingeroutward. tendon of another muscle whose direction is different. Tendons may bereadily felt at the wrist, ankle, the bend of the elbow, and under theknee, when the muscles are tense. MUSCLES. —FAT. ^ body is the Tendo Achillis, which connects certain muscleson the back of the leg with the heel.1 Involuntary muscles, for the most part, are not attachedto bones, but to other structures. 49. Arrangement of Muscles. — Muscles

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