File:Stage8 sem3.jpg: Difference between revisions

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Scanning EM showing detail of the Nodal Cilia

Human embryo (Stage 8, day 18) nodal cilia are the long cellular processes, the shorter processes visible on cells in the image are microvilli.

Nodal cilia (microtubule-based motile cell structures) are thought to act to "stir" the overlying fluid layer at the time of gastrulation. This fluid contains secreted morphogens that are moved in one direction and therefore may have a role in establishing the initial embryo left/right axis.

Microvilli (microfilament-based non-motile cell structures) increase the cell membrane surface area for absorption and secretion.

Links: Stage 8 | Gastrulation | Nodal Cilia Movie | Cilium cartoon

Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development

Original file name:Stage8day18nodalcilia.jpg

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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

	Gwalagizhi	Nyangagi	Dimensions	User	Comment
current	08:59, 22 August 2009		1,000 × 709 (91 KB)	S8600021 (talk \| contribs)	Human embryo (Stage 8, day 18) Scanning EM showing detail of the nodal cilia. Original file name:Stage8day18nodalcilia.jpg {{Template:SEM}}

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 ==Scanning EM showing detail of the Nodal Cilia==
-Human embryo ([[Carnegie stage 8|Stage 8]], day 18) nodal cilia detail. These nodal cilia are thought to act to "stir" the overlying fluid layer at the time of gastrulation. This fluid contains secreted morphogens that are moved in one direction and therefore may have a role in establishing the initial embryo left/right axis.
+Human embryo ([[Carnegie stage 8|Stage 8]], day 18) nodal cilia are the long cellular processes, the shorter processes visible on cells in the image are microvilli.
+Nodal cilia (microtubule-based motile cell structures) are thought to act to "stir" the overlying fluid layer at the time of gastrulation. This fluid contains secreted morphogens that are moved in one direction and therefore may have a role in establishing the initial embryo left/right axis.
-:'''Links:''' [[Carnegie stage 8|Stage 8]] | [[Gastrulation]]
+Microvilli (microfilament-based non-motile cell structures) increase the cell membrane surface area for absorption and secretion.
+:'''Links:''' [[Carnegie stage 8|Stage 8]] | [[Gastrulation]] | [[Nodal Cilia Movie]] | [[:File:Cilium cartoon.jpg|Cilium cartoon]]
 {{SEM}}