The Problem of Age, Growth, And Death
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In our eReader you can find the full English version of the book. Read The Problem of Age, Growth, And Death Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Problem of Age, Growth, And Death
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is called the axon of the nerve cell. In this case the modification of the shape of the cell has adapted it to the better performance of its functions. Xotice also in these cells the enormous increase in the amount of protoplasm as compared with the nucleus. In the young cell of the rabbit germ, of which I showed you several illustrations a few moments ago, we had very little protoplasm for each nucleus, but here the protoplasm has many, many times the volume of the nucleus, and this is a relat...ively old cell.
Xext let us look again at the figure of the striated muscle fiber, which you may recall from the second lecture, so that it will suffice if your attention is again directed to the oval nuclei, and to the lines stretching crosswise on the muscle giving it a " striated " appearance.
You remember, doubtless, that such fibers are the ones which enable us to make voluntary motions. Originally each fiber was a set of 368 POPULAR SCIENCE MONTHLY cells, and the cells had some protoplasm, but, gradually, as develop- ment progressed, there appeared in them longitudinal fibrils different from the protoplasm, and the fibrils also created ultimately the appear- ance of cross lines on the fiber.
What to read after The Problem of Age, Growth, And Death?
You can find similar books in the "Read Also" column, or choose other free books by Minot, Charles Sedgwick, 1852-1914 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
is called the axon of the nerve cell. In this case the modification of the shape of the cell has adapted it to the better performance of its functions. Xotice also in these cells the enormous increase in the amount of protoplasm as compared with the nucleus. In the young cell of the rabbit germ, of which I showed you several illustrations a few moments ago, we had very little protoplasm for each nucleus, but here the protoplasm has many, many times the volume of the nucleus, and this is a relat...ively old cell.
Xext let us look again at the figure of the striated muscle fiber, which you may recall from the second lecture, so that it will suffice if your attention is again directed to the oval nuclei, and to the lines stretching crosswise on the muscle giving it a " striated " appearance.
You remember, doubtless, that such fibers are the ones which enable us to make voluntary motions. Originally each fiber was a set of 368 POPULAR SCIENCE MONTHLY cells, and the cells had some protoplasm, but, gradually, as develop- ment progressed, there appeared in them longitudinal fibrils different from the protoplasm, and the fibrils also created ultimately the appear- ance of cross lines on the fiber.
What to read after The Problem of Age, Growth, And Death?
You can find similar books in the "Read Also" column, or choose other free books by Minot, Charles Sedgwick, 1852-1914 to read onlineMoreLess
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