Intermediate Physiology And Hygiene, for Lower Grammar Grades;
Intermediate Physiology And Hygiene, for Lower Grammar Grades;
Hall Winfield Scott
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Think, too, how many things you do which depend upon your seeing well, and then you will realize how valuable this sense is. 104 PHYSIOLOGY Look about and see how much there is that is beautiful and how much there is to see. After looking at . An object you can shut your eyes and can still see it with your mind. If you had never had eyes, you could not bring pictures to mind as you now can. You could tell FIG. 14. SECTION OF THE EYE. a, bony case of the eye ; b, muscle to move the eye ; c and d..., coverings of the eye ; e, lining or seeing part of the eye ; /, eyelid ; g, colored cur- tain or iris ; h, and i, clear windows of the eye. the shape of objects by feeling them, but without sight all sense of color would be lacking. The eye, itself, is the shape of a sphere (Fig. 14), and rests on a cushion of fat in a bony hol- low or socket. The upper edge of the socket stands out and forms the brow which protects SEEING 105 the eye. The skin over the brow has a line of hair the eyebrow which keeps the perspira- tion from running into the eye.
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