. Elementary biology, animal and human. Biology. A = Correct is largely a matter of muscidar train- ing. In standing (Fig. 48), the head and body should be erect, the heels brought close together, and the shoulders brought into such a posi- tion that the back is approximately flat. In sitting (Pig. 49), care should be taken not to bend the body over the desk, and a proper relation between height of chair and desk should be secured. Permanent curvature of the spine frequently results from carrying loads of books or other heavy ob- jects on one side of the body only; pupils should ther
. Elementary biology, animal and human. Biology. A = Correct is largely a matter of muscidar train- ing. In standing (Fig. 48), the head and body should be erect, the heels brought close together, and the shoulders brought into such a posi- tion that the back is approximately flat. In sitting (Pig. 49), care should be taken not to bend the body over the desk, and a proper relation between height of chair and desk should be secured. Permanent curvature of the spine frequently results from carrying loads of books or other heavy ob- jects on one side of the body only; pupils should therefore train them- selves to use the arms alternately for this purpose. IV. The Nervous System B = Incorrect posture. 228. The body as a collection of organs. — In the preceding chap- ters we have discussed the diges- tive, respiratory, and circulatory systems and have seen that these organs furnish all parts of the body with food and oxygen. We have studied the process of oxidation whereby we keep warm and gain the power to do work. And finally we are familiar with the fact that the bones and muscles are the organs that give support to the body and provide the machinery for all our motions. Thus we see that the body is composed of many organs, each with its special function or Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912
