. First book on anatomy, physiology, and hygiene : for grammar schools and families . hen the true skin is destroyed by cuts or burns?332. What is said of the nerves of the true skin ? How are the papillaeformed ? Where may they be seen ? 333. What are the lymphatics of theskin ? 118 ANATOMY, PHYSIOLOGY, AND HYGIENE. into action when ointments are rubbed on the skin; and also invaccination, to prevent the small-pox. 334. The perspiratory apparatus consists of minute tubes,which pass inward through the cuticle, and terminate in thedeeper meshes of -the true skin. In their course, each littletub
. First book on anatomy, physiology, and hygiene : for grammar schools and families . hen the true skin is destroyed by cuts or burns?332. What is said of the nerves of the true skin ? How are the papillaeformed ? Where may they be seen ? 333. What are the lymphatics of theskin ? 118 ANATOMY, PHYSIOLOGY, AND HYGIENE. into action when ointments are rubbed on the skin; and also invaccination, to prevent the small-pox. 334. The perspiratory apparatus consists of minute tubes,which pass inward through the cuticle, and terminate in thedeeper meshes of -the true skin. In their course, each littletube forms a beautiful spiral coil; and, on arriving at its desti-nation, coils upon itself in such a way as to constitute an oval-shaped, or globular ball, called the perspiratory gland. 335. The oil-glands are small bodies embedded in the trueskin. They connect with the surface of the skin by smalltubes, which traverse the cuticle. In some parts these glandsare wanting; in others, where their office is most needful, theyare abundant; as on the nose, the head, and the ears. Fig. Fig. G7. 1, 2, 3, Oil-glands and tubes from different parts of the body. A, A, A,Glands. B, B, B, The ducts of these glands. 4, An oil-gland, and tube from thescalp. The glands (A) form a cluster around the tube of the hair, (C.) These ductsopen into the sheath of the hair, (B.) The figures, from 1 to 4, are magnified tliirty-eiglit diameters. Observation. When there is an unnatural accumulation ofoil in the tubes, it produces the worm, or grub. 334. Of what does the perspiratory apparatus consist ? 335. Describethe oil-glands. What is said of their distribution? Explain fig. does an unnatural accumulation of this oily matter produce ? PHYSIOLOGY OF THE SKIN. 119 CHAPTER XXV. PHYSIOLOGY OF THE SKIN. 336. The skin invests the whole of the external surface ofthe body, following all its prominences and curves, and givesprotection to all the organs it encloses, while each of its severalparts has
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