A healthy body. A textbook on anatomy, physiology, hygiene, alcohol, and narcotics. For use in intermediate grades in public and private schools (1889) (14763224845)
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Identifier: healthybodytextb00stow (find matches)
Title: A healthy body. A textbook on anatomy, physiology, hygiene, alcohol, and narcotics. For use in intermediate grades in public and private schools
Year: 1889 (1880s)
Authors: Stowell, Charles H(enry) 1850- (from old catalog)
Subjects: Human physiology
Publisher: Chicago, J.C. Buckbee and company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress
Text Appearing Before Image:
Size of the Tendons. The tendons are always muchsmaller than the muscles to which they belong. This is well illustrated in Fig. 14.The muscles at the middleof the fore-arm, as shown inthe figure, are quite large,while the tendons at the wristare so small that it can bespanned with the thumb andfinger. This makes the move-ments at the wrist more freeand easy. The largest tendon in thebody is at the back of the leg.It is attached by a muscle to theheel, so that when that musclecontracts, the tendon draws upthe heel, as in walking. The muscle is the activepart ; the tendon is only acord which can be pulled bythe muscle.
Text Appearing After Image:
Fig. 14. The muscles of thearm, ending in the white ten-dons at the wrist. classes, Two Kinds of Muscle. Themuscles are divided into twothe voluntary, and the involuntary. THE MUSCLES. 49 We can move some muscles whenever we wish, asthose of tlie face and the arm. Because we are thusable to control their move-ments, they are called vol-untary. But some musclescannot be controlled in thisway. They do their workwhether we wish it or not.We cannot control their move-ments by the will, so theyare called involuntary. Themuscles of the stomach andthe heart are of this variety.The heart beats and the stom-ach contracts, and we have nopower to stop them.
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