The Principles of Biology
The Principles of Biology
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In our eReader you can find the full English version of the book. Read The Principles of Biology 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 Principles of Biology
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362. The sensory elements found in the skin of Vertebrates are of various types which may be divided into two classes. In one class the fibre ends in a bushy system of branches which penetrate among the other normal elements of the surrounding tissues. In the other class the fibre may end with or without FIG. 76. The blue crab. View of the region around the mouth to show the groups of cuticular hairs, which are in large part sensory. X i 1/2.
terminal branching, but in either case there are alw...ays some of the cells of the surrounding tissues modified to form a special stimulating organ. The first class, the free nerve terminations, are found chiefly in the deeper layers of the epidermis, though they may also be found in the dermis. The second class, which for want of a better name may be called sensory corpuscles, are found chiefly in the superficial and deeper layers of the SENSE ORGANS 155 dermis, though some are also found in the epidermis (in man only in the dermis).
363. The nuclei of all sensory elements of the skin of verte- brates lie in the spinal ganglia and homologous ganglia of the cranial nerves.
What to read after The Principles of Biology?
You can find similar books in the "Read Also" column, or choose other free books by J I John Irvin Hamaker to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
362. The sensory elements found in the skin of Vertebrates are of various types which may be divided into two classes. In one class the fibre ends in a bushy system of branches which penetrate among the other normal elements of the surrounding tissues. In the other class the fibre may end with or without FIG. 76. The blue crab. View of the region around the mouth to show the groups of cuticular hairs, which are in large part sensory. X i 1/2.
terminal branching, but in either case there are alw...ays some of the cells of the surrounding tissues modified to form a special stimulating organ. The first class, the free nerve terminations, are found chiefly in the deeper layers of the epidermis, though they may also be found in the dermis. The second class, which for want of a better name may be called sensory corpuscles, are found chiefly in the superficial and deeper layers of the SENSE ORGANS 155 dermis, though some are also found in the epidermis (in man only in the dermis).
363. The nuclei of all sensory elements of the skin of verte- brates lie in the spinal ganglia and homologous ganglia of the cranial nerves.
What to read after The Principles of Biology?
You can find similar books in the "Read Also" column, or choose other free books by J I John Irvin Hamaker to read onlineMoreLess
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