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Illustrating four stages in the development of a sweat gland (adapted from Kollman). A, B, Four months; C, D, seven months. | Illustrating four stages in the development of a sweat gland (adapted from Kollman). A, B, Four months; C, D, seven months. | ||
Sudoriferous glands begin to develop in the fourth month from the epidermis of the finger tips, the palms of the hands, and the soles of the feet. They are formed as solid downgrowths from the epidermis, but differ from hair anlages in being more compact and in lacking the mesenchymal papillie at their bases (Fig. 233, A, B). During the sixth month the simple cords coil, and, in the seventh month, their lumina appear (Fig. 233, C, D). The inner layer of eells forms the gland cells, while the outer cells become transformed into smooth muscle fibers, which, accordingly, are ectodermal. In the axilla, eyelids, and external acoustic meatus the sweat glands are large and branched. | |||
{{Arey1924 Footer}} | {{Arey1924 Footer}} | ||
[[Category:Integumentary]] | [[Category:Integumentary]] |
Revision as of 13:04, 23 October 2016
Fig. 233. Vertical sections of the integument
Illustrating four stages in the development of a sweat gland (adapted from Kollman). A, B, Four months; C, D, seven months.
Sudoriferous glands begin to develop in the fourth month from the epidermis of the finger tips, the palms of the hands, and the soles of the feet. They are formed as solid downgrowths from the epidermis, but differ from hair anlages in being more compact and in lacking the mesenchymal papillie at their bases (Fig. 233, A, B). During the sixth month the simple cords coil, and, in the seventh month, their lumina appear (Fig. 233, C, D). The inner layer of eells forms the gland cells, while the outer cells become transformed into smooth muscle fibers, which, accordingly, are ectodermal. In the axilla, eyelids, and external acoustic meatus the sweat glands are large and branched.
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Reference
Arey LB. Developmental Anatomy. (1924) W.B. Saunders Company, Philadelphia.
Cite this page: Hill, M.A. (2024, May 19) Embryology Arey1924 fig233.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Arey1924_fig233.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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13:03, 23 October 2016 | 1,793 × 860 (259 KB) | Z8600021 (talk | contribs) | ==Fig. 233. Vertical sections of the integument== Illustrating four stages in the development of a sweat gland (adapted from Kollman). A, B, Four months; C, D, seven months. |
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