File:Streeter1921 fig10.jpg

From Embryology

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Figure 10. Camera-lucida sketch of the vertex of the head of a human embryo 27.5 mm long

Carnegie Collection, No. 1458

In which the blood-vessels were conspicuous through a natural injection. It is the exception where two channels are found so nearly the same size. From a single specimen, like this, one might incorrectly gain the impression that the superior sagittal sinus is at first bilaterally symmetrical. Even here, however, it can be seen that both of the larger channels drain caudally to the right side. The minute anastomosing loops that connect the two main channels with each other and with the channels in the more ventral parts of the falx are not shown. On each side can be seen the serrated upper margin of the advancing capillary plexus of the skin. Above this margin the skin is as yet nonvascular. On account of the dilatation of these vessels along this advancing edge the margin is conspicuous.


1921 Human Brain Vascular: Fig 1 | Fig 2 | Fig 3 | Fig 4 | Fig 5 | Fig 6 | Fig 7-9 | Fig 10 | Fig 11 | Fig 12 |Fig 13 | Fig 14 | Fig 15 | Fig 16 | Fig 17 | Fig 18 | Fig 19 | Fig 20 | Fig 21 | Fig 22 | Fig 23 | Fig 24 | Fig 25 | Fig 26 | Fig 27 | Plate 1 - embryos 4 mm to birth | Plate 2 - embryo 4 mm | Plate 3 - embryo 11.5 mm | Plate 4 - embryo 21 mm | Plate 5 - embryo 43 mm | Carnegie No.24 | George Streeter


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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Streeter GL. The developmental alterations in the vascular system of the brain of the human embryo. (1921) Contrib. Embryol., Carnegie Inst. Wash. 8:7-38.


Cite this page: Hill, M.A. (2024, March 1) Embryology Streeter1921 fig10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Streeter1921_fig10.jpg

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