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==Plate 4. he developmental alterations in the vascular system of the brain of the human embryo== | ==Plate 4. he developmental alterations in the vascular system of the brain of the human embryo== | ||
By George L. Streeter. (five plates and twelve text-figures) | |||
Left lateral view of a wax-plate reconstruction of the larger blood-ves.sels of the brain in a human embryo 21 mm long (Carnegie Collection, No. 460). Enlarged 16.4 diameters. Instead of the head being drained by the primary head-vein, this is now accomplished by a more dorsally situated channel that has formed through the meshes of the middle and posterior dural plexuses to become the transverse sinus. (Compare with text-figure 3. which shows a left profile of the same specimen.) All that is left of the primary head-vein is that portion which is to become the cavernous sinus. In this model the right cerebral hemisphere has been dissected so as to expose the chorioidal body with its arterial feeder anil the straight sinus draining it. The plexiform character of the superior sagittal sinus and of the caudal end | |||
of the straight sinus is indicative of their transitory condition. | |||
[[Category:Human]] [[Category:Head]] [[Category:Cardiovascular]] | [[Category:Human]] [[Category:Head]] [[Category:Cardiovascular]] | ||
Revision as of 15:02, 16 February 2011
Plate 4. he developmental alterations in the vascular system of the brain of the human embryo
By George L. Streeter. (five plates and twelve text-figures)
Left lateral view of a wax-plate reconstruction of the larger blood-ves.sels of the brain in a human embryo 21 mm long (Carnegie Collection, No. 460). Enlarged 16.4 diameters. Instead of the head being drained by the primary head-vein, this is now accomplished by a more dorsally situated channel that has formed through the meshes of the middle and posterior dural plexuses to become the transverse sinus. (Compare with text-figure 3. which shows a left profile of the same specimen.) All that is left of the primary head-vein is that portion which is to become the cavernous sinus. In this model the right cerebral hemisphere has been dissected so as to expose the chorioidal body with its arterial feeder anil the straight sinus draining it. The plexiform character of the superior sagittal sinus and of the caudal end
of the straight sinus is indicative of their transitory condition.
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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan
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| 14:42, 16 February 2011 |  | 1,200 × 929 (160 KB) | S8600021 (talk | contribs) | ==The developmental alterations in the vascular system of the brain of the human embryo== By George L. Streeter. (five plates and twelve text-figures) |
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