File:The school physiology journal (1902) (14791024173).jpg

Identifier: schoolphysiology12bost (find matches)
Title: The school physiology journal
Year: 1902 (1900s)
Authors:
Subjects: Physiology Hygiene Temperance Physiology Hygiene Temperance
Publisher: Boston : Mary H. Hunt
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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I see nowwhat the wrinkles are for.The skin is loose on thejoints so that we canmove them. What do we call any-thing that will stretch?asked Miss West. Pinchup a bit of skin on theback of your hands andfind whether the skin iselastic. How do youknow? Press your fingersclose together and holdthem up to the light.AVhat do you see? Whatgives them that rosy lookabout the edges ? Wouldyou think then that theskin is thick or thin?Find the thickest places, the thinnest. What do we call places on thehand which get very thick and tough from row-ing a boat or doing any hard work? u What will happen if we dip the corner ofa handkerchief in water? Ralph may try.Im! the end of your finger in the water too, andkeep it there as long as you do the hand-kerchief. Why docs the water rise in the handkerchiefand not on your finger? Nobody knew, so Miss West told about thepores in the handkerchief which soaked up thewater, and showed them through the microscope. There are pores in the skin, too, but they
Text Appearing After Image:
Youll leave enough to grow, wont you, mister? are so arranged that waste matter from the bodycan go out easily, while very little of anythingcan get in. Look at a chickens leg, or the backof a fish, and you will see what I mean. Nowwho can tell me how these scales or pieces ofoutside skin are arranged? I know, volunteered Scott, the skin isput on just like shingles on a roof, they all lapone way. Is that so the water cant soak h>when we get wet? Yes, to keep everything from getting intothe body that does not belong there. You have all peeled black birch bark off thetrees to eat. Here is some now. Look at itcarefully and find how many layers it has andhow they differ. It is in two layers, was announced pres-ently. The one on theoutside is thin and dry.The inner layer is thickand dark green. The skin grows invery much the sameway, said Miss West.It is in two layers.The outside layer hasdone growing and is allthe time wearing out anddropping off. Stick a pinthrough it just at the root

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