Template:Endocrine embryo table: Difference between revisions
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| [[Carnegie stage 17|'''Stage 17''']] | | [[Carnegie stage 17|'''Stage 17''']] | ||
* [[Endocrine - Pituitary Development|Pituitary]] - juxtacerebral wall of the craniopharyngeal pouch is the thicker. The lateral lobes (future infundibular, or tuberal, part) and the anterior chamber (Vorraum) are clearly visible.<ref name=O'Rahilly1973a>{{Ref-O'Rahilly1973a}}</ref>The infundibular recess displays a characteristically folded wall, namely the neurohypophysis.<ref name=O'Rahilly1973a>{{Ref-O'Rahilly1973a}}</ref> | * [[Endocrine - Pituitary Development|Pituitary]] - juxtacerebral wall of the craniopharyngeal pouch is the thicker. The lateral lobes (future infundibular, or tuberal, part) and the anterior chamber (Vorraum) are clearly visible.<ref name=O'Rahilly1973a>{{Ref-O'Rahilly1973a}}</ref>The infundibular recess displays a characteristically folded wall, namely the neurohypophysis.<ref name=O'Rahilly1973a>{{Ref-O'Rahilly1973a}}</ref> | ||
* Thymus - connection of the thymus with the pharynx has been severed | * Thymus - connection of the thymus with the pharynx has been severed.<ref name=Weller1933>{{Ref-Weller1933}}</ref> The thymus is intimately approximated to the cervical duct (ibid.) According to Norris (1937), both third and fourth pouches make contact with the ectoderm, although only the third "receives an increment from the ectoderm". | ||
* [[Endocrine - Parathyroid Development|Parathyroids]] -parathyroid 4 is attached to the lateral surface of what Weller (1933)<ref name=Weller1933>{{Ref-Weller1933}}</ref> termed the "lateral thyroid component" | * [[Endocrine - Parathyroid Development|Parathyroids]] -parathyroid 4 is attached to the lateral surface of what Weller (1933)<ref name=Weller1933>{{Ref-Weller1933}}</ref> termed the "lateral thyroid component" | ||
* [[Endocrine - Thyroid Development|Thyroid]]. The lobes of the thyroid curve around the carotid arteries and are connected by a delicate isthmus. Lacunae "should not be confused with lumina of follicles".<ref name=Weller1933>{{Ref-Weller1933}}</ref> | * [[Endocrine - Thyroid Development|Thyroid]]. The lobes of the thyroid curve around the carotid arteries and are connected by a delicate isthmus. Lacunae "should not be confused with lumina of follicles".<ref name=Weller1933>{{Ref-Weller1933}}</ref> | ||
* [[Endocrine - Adrenal Development|Adrenal]] | * [[Endocrine - Adrenal Development|Adrenal]] | ||
** Adrenal Cortex - dorsal part of the whole suprarenal primordium is disorganized by the invasion of sympathetic nerves and cells, while the band of C2 cells and the coelomic epithelium remain intact | ** Adrenal Cortex - dorsal part of the whole suprarenal primordium is disorganized by the invasion of sympathetic nerves and cells, while the band of C2 cells and the coelomic epithelium remain intact.<ref name=Crowder1957>{{Ref-Crowder1957}}</ref> | ||
** Adrenal Medulla - first neural migration is at its height. Growth of the para-aortic complex is extensive. The plexiform complex is derived from paravertebral sympathetic ganglia T6-12 and usually L 1. Included in it are the primordia of the suprarenal medulla and of the celiac, superior mesenteric, and renal plexuses. Nerve fibres and "paraganglion" (M3) cells enter. | ** Adrenal Medulla - first neural migration is at its height. Growth of the para-aortic complex is extensive. The plexiform complex is derived from paravertebral sympathetic ganglia T6-12 and usually L 1. Included in it are the primordia of the suprarenal medulla and of the celiac, superior mesenteric, and renal plexuses. Nerve fibres and "paraganglion" (M3) cells enter. | ||
* Pancreas - ventral pancreas has now fused with dorsal.<ref name=Streeter1948>{{Ref-Streeter1948}}</ref> Perhaps the ventral and dorsal ducts have begun to blend | * Pancreas - ventral pancreas has now fused with dorsal.<ref name=Streeter1948>{{Ref-Streeter1948}}</ref> Perhaps the ventral and dorsal ducts have begun to blend.<ref name=RussuVaida1959>{{Ref-RussuVaida1959}}</ref> | ||
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| [[Carnegie stage 18|'''Stage 18''']] (week 7) | | [[Carnegie stage 18|'''Stage 18''']] (week 7) |
Revision as of 14:35, 1 November 2016
Human Embryonic Endocrine |
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Data based on data from O'Rahilly (1983).[1] |
Stage 13 (week 4)
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Stage 14 (week 5)
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Stage 15
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Stage 16 (week 6)
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Stage 17
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Stage 18 (week 7)
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Stage 19
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Stage 20 (week 8)
(1938), of migration of and covering by "cells derived from the cervical sinus".
Weller (1933, Fig. 23) showed parathyroid 3 still rostral to parathyroid 4 at 23 mm, whereas (presumably due to variation in the "descent" of the thymus) (Norris 1937, Fig. 4[17]) showed parathyroid 3 rostral to, level with, and caudal to parathyroid 4 in embryos of 16-17 mm. |
Stage 21
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Stage 22
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Stage 23
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References
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