The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . enderedunable to perform its duty in the organism, death isthe result. 324. Structure of the Skin.—The skin is com-posed essentially of two layers, one called the cuticleor epidermis, and the other the cutis or derma ().^ The former is the outside layer, and the lat-ter the inside. The epidermis consists of small, flat-tened, d
The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . enderedunable to perform its duty in the organism, death isthe result. 324. Structure of the Skin.—The skin is com-posed essentially of two layers, one called the cuticleor epidermis, and the other the cutis or derma ().^ The former is the outside layer, and the lat-ter the inside. The epidermis consists of small, flat-tened, dry scales, and receives the brunt of injuriesand abrasions. The thickness of this layer is shownin a blister, the epidermis being there separatedfrom the layer beneath by the fluid which fills The inner layer, or derma, constitutes * Cutis is the Latin for skin, and cuticle means little skin; dermais the Greek for skin, and epidermis means the outer layer of the skin,or, literally, upon the skin \ Vesicle is from the Latin, and means a bladder, which a blistersomewhat resembles. THE SKIN. 253 what is sometimes called the true skin. This layeralone contains nerves, blood-vessels, hair-bulbs, and Epidermis. 1I J- .-% J^/ j^S^^ (^C#) z^--* Sweat-glands. Fatty tissue. Fig. 62.—Diagram representing- a vertical section of the skin. Attached tothe hair are two sebaceous glands. the Other appendages of the skin. It is made up ofstrong interlacing fibers of connective tissue, whichform a firm, close covering for the delicate tissuesbeneath. This layer varies in thickness in differentparts of the body, from one fiftieth to about one sixthof an inch. For instance, the skin of the eyelid isvery thin, while that of the small of the back is thethickest in the body. 325. The Derma. — The under surface of thederma is merged in the loose connective tissuewhich lies between the skin and the flesh. It is inthis loose tissue that fat accumulates,
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