Image from page 300 of "Elementary biology; an introduction to the science of life" (1924)
Title: Elementary biology; an introduction to the science of life
Identifier: elementarybiolog00grue
Authors: Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965
Subjects: Biology
Publisher: Boston New York [etc. ] Ginn and company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library
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DEVELOPMENT 283 In the large class of Insecta the development is characterized by more or less complete metamorphosis (see Figs. 115 and 117). In the life history of the frog and the salamander we find a metamorphosis that is as well marked in some ways as that of the insects (see Fig. 118). A complex animal, developing from a single cell, passes through a number of stages that are different from the finished form, on the one hand, and from the simple beginning, on the other. This is really all that metamorphosis means when applied to living things in general. It is another name for devel- opment. But when we use the latter term, we have in mind the process, whereas when we say " metamorphosis," our attention is fixed on the forms, or stages. 330. Metamorphosis in man. The changes that
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Fig. 119. Metamorphosis in man A comparison of the infant and the adult shows that after birth the legs of the baby grow more than any other part, whereas the head grows the least. A study of this figure will show other changes that take place in the outward form take place in a human being from day to day are comparatively slow, and che form of the infant is in general very much like that of the adult, so that we do not commonly think of the metamorphosis of human beings. But if we compare the proportions of a baby with the proportions of an adult, we can see that the changes are real even in the outward form (see Fig. 119). A man is something more than a large baby, something different, even in this outward form. We know, of course, that as we become older there are many changes in the internal
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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 work.
Image from page 300 of "Elementary biology; an introduction to the science of life" (1924)
Title: Elementary biology; an introduction to the science of life
Identifier: elementarybiolog00grue
Authors: Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965
Subjects: Biology
Publisher: Boston New York [etc. ] Ginn and company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library
View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing Before Image:
DEVELOPMENT 283 In the large class of Insecta the development is characterized by more or less complete metamorphosis (see Figs. 115 and 117). In the life history of the frog and the salamander we find a metamorphosis that is as well marked in some ways as that of the insects (see Fig. 118). A complex animal, developing from a single cell, passes through a number of stages that are different from the finished form, on the one hand, and from the simple beginning, on the other. This is really all that metamorphosis means when applied to living things in general. It is another name for devel- opment. But when we use the latter term, we have in mind the process, whereas when we say " metamorphosis," our attention is fixed on the forms, or stages. 330. Metamorphosis in man. The changes that
Text Appearing After Image:
Fig. 119. Metamorphosis in man A comparison of the infant and the adult shows that after birth the legs of the baby grow more than any other part, whereas the head grows the least. A study of this figure will show other changes that take place in the outward form take place in a human being from day to day are comparatively slow, and che form of the infant is in general very much like that of the adult, so that we do not commonly think of the metamorphosis of human beings. But if we compare the proportions of a baby with the proportions of an adult, we can see that the changes are real even in the outward form (see Fig. 119). A man is something more than a large baby, something different, even in this outward form. We know, of course, that as we become older there are many changes in the internal
Note About Images
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 work.