File:Streeter-plate03.jpg: Difference between revisions

Plate 3. The developmental alterations in the vascular system of the brain of the human embryo

By George L. Streeter. (five plates and twelve text-figures)

Right and left profile views of a wax-plate reconstruction of the blood-vessels of the brain in a human embryo 11.5 mm long (Carnegie Collection. No. 544). Enlarged about 14 diameters.

• The primary head-vein still constitutes the main drainage-channel of the head.
• The manner in which its tributaries tap the deep capillary sheet investing the brain is indicated over a small area of the cerebral hemisphere.
• A capillary mesh of that kind invests the entire central nervous system, but is not shown in the model.

--Mark Hill 09:42, 17 February 2011 (EST) Estimated as Carnegie Stage 17 Week 6 on the basis of CRL and the presence of digital rays.

Plate links: 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

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Reference

The Developmental Alterations in the Vascular System of the Brain of the Human Embryo Contributions to Embryology Carnegie Institution No.24 by George L. Streeter, with five plates and twelve text-figures (1921).