The History of the Human Body
The History of the Human Body
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In our eReader you can find the full English version of the book. Read The History of the Human Body 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 History of the Human Body
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), and belongs with the ventral division, innerved by ventral branches of the spinal nerves. In birds, correlated with the lack of mobility of the trunk vertebrae, the corresponding muscles are greatly reduced, but as this loss of motion is not a complete one as in the turtle, so also is the reduction of the muscles not as extreme. The muscles of neck and tail, on the other hand, are extremely well developed, thus emphasizing by contrast the almost rudimen- tary condition of the muscles of the ...back.
In taking up the differentiation of the axial muscles more in detail, their division into dorsal and ventral masses must be emphasized, for, although both are derived embryologically from the epimeres, that is, the originally dorsal portions of the mesodermic somites, yet the distinction is of fundamental importance topographically and morphologically, because they are innerved respectively by the dorsal and ventral branches of the spinal nerves, a criterion which may always be relied upon to help out the homology in doubtful cases, where a muscle lies near the boundary between them or where an extreme de- gree of differentiation has changed the primary location.
What to read after The History of the Human Body?
You can find similar books in the "Read Also" column, or choose other free books by Harris Hawthorne Wilder to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
), and belongs with the ventral division, innerved by ventral branches of the spinal nerves. In birds, correlated with the lack of mobility of the trunk vertebrae, the corresponding muscles are greatly reduced, but as this loss of motion is not a complete one as in the turtle, so also is the reduction of the muscles not as extreme. The muscles of neck and tail, on the other hand, are extremely well developed, thus emphasizing by contrast the almost rudimen- tary condition of the muscles of the ...back.
In taking up the differentiation of the axial muscles more in detail, their division into dorsal and ventral masses must be emphasized, for, although both are derived embryologically from the epimeres, that is, the originally dorsal portions of the mesodermic somites, yet the distinction is of fundamental importance topographically and morphologically, because they are innerved respectively by the dorsal and ventral branches of the spinal nerves, a criterion which may always be relied upon to help out the homology in doubtful cases, where a muscle lies near the boundary between them or where an extreme de- gree of differentiation has changed the primary location.
What to read after The History of the Human Body?
You can find similar books in the "Read Also" column, or choose other free books by Harris Hawthorne Wilder to read onlineMoreLess
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