Difference between revisions of "2010 BGD Practical 6 - Week 6"

From Embryology
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Key Events of Human Development during the sixth week (week 6) following fertilization or Clinical week 8 (LMP).
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{| class="prettytable"
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| <center>'''Day'''</center>
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| <center>'''Stage'''</center>
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| '''Event'''
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|-
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| <center>36</center>
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|
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| [http://embryology.med.unsw.edu.au/Notes/endocrine7.htm Pituitary ] Week 6 - connecting stalk between pouch and oral cavity degenerates
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[http://embryology.med.unsw.edu.au/Notes/endocrine17.htm Parathyroid] Week 6 - diverticulum elongate, hollow then solid, dorsal cell proliferation
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[http://embryology.med.unsw.edu.au/Notes/endocrine13.htm Thymus] Week 6 - diverticulum elongate, hollow then solid, ventral cell proliferation
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[http://embryology.med.unsw.edu.au/Notes/endocrine9.htm Adrenal ] Week 6  - fetal cortex forms from mesothelium adjacent to dorsal mesentery, medulla neural crest cells from adjacent sympathetic ganglia
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[http://embryology.med.unsw.edu.au/Notes/respire.htm Respire]  Week 6 - descent of heart and lungs into thorax. Pleuroperitoneal foramen closes
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[http://embryology.med.unsw.edu.au/Notes/tongue.htm Tongue]  Week 6 - descent of heart and lungs into thorax. Pleuroperitoneal foramen closes gustatory papilla, caudal midline near the foramen caecum (week 6 to 7 - nerve fibers approach the lingual epithelium)
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|-
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| <center>37</center>
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| [[Carnegie_stage_16|Stage 16]]
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| [[File:Stage16_bf1c.jpg|200px|link=Carnegie stage 16]] [http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural] first parasympathetic ganglia, submandibular and ciliary, are identifiable [http://www.ncbi.nlm.nih.gov/pubmed/2751117 PMID: 2751117]
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[http://embryology.med.unsw.edu.au/Notes/skmus7.htm Limbs]  upper limb bud '''nerves''' median nerve, radial nerve and ulnar nerve entered into hand plate, '''myoblasts''' spindle shaped and oriented parallel to limb bud axis.
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[http://embryology.med.unsw.edu.au/Notes/heart.htm Heart]  outflow tract elliptical configuration with four cushions, the two larger fusing at this stage. Semilunar valve leaflets form at the downstream end of the cushions
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[http://embryology.med.unsw.edu.au/Notes/head.htm Head]  lip and palate components of the upper lip, medial nasal prominence and maxillary process present, median palatine process appears.
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|-
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| <center>38</center>
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| <center>39</center>
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|-
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| <center>40</center>
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|-
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| <center>41</center>
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| [[Carnegie_stage_17|Stage 17]]
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| [[File:Stage17_bf1c.jpg|200px|link=Carnegie stage 17]]
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[http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  telencephalon areas of the future archicortex, paleocortex, and neocortex, visible. Beginning of future choroid plexus [http://www.ncbi.nlm.nih.gov/pubmed/2802187 PMID: 2802187]
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[http://embryology.med.unsw.edu.au/Notes/nose.htm Sense - Smell]  olfactory nerve fibres enter the brain [http://www.ncbi.nlm.nih.gov/pubmed/15604533 PMID: 15604533]
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[http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  primordium of the epidural space appears first on the ventral part of the vertebral canal and develops rostro-caudally [http://www.ncbi.nlm.nih.gov/pubmed/15478101 PMID: 15478101]
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|-
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| <center>42</center>
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| &nbsp;
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| [http://embryology.med.unsw.edu.au/Notes/head.htm Heart]  separation of common cardiac outflow (aortic arch and pulmonary aorta)
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[[Category:Week 6]]

Revision as of 16:17, 13 May 2010

Introduction

BGDsmall.jpg

Practical 6: Week 3 | Week 4 | Week 5 | Week 6 | Week 7 | Week 8 | Quiz


Key Events of Human Development during the sixth week (week 6) following fertilization or Clinical week 8 (LMP).

Day
Stage
Event
36
Pituitary Week 6 - connecting stalk between pouch and oral cavity degenerates

Parathyroid Week 6 - diverticulum elongate, hollow then solid, dorsal cell proliferation

Thymus Week 6 - diverticulum elongate, hollow then solid, ventral cell proliferation

Adrenal Week 6 - fetal cortex forms from mesothelium adjacent to dorsal mesentery, medulla neural crest cells from adjacent sympathetic ganglia

Respire Week 6 - descent of heart and lungs into thorax. Pleuroperitoneal foramen closes

Tongue Week 6 - descent of heart and lungs into thorax. Pleuroperitoneal foramen closes gustatory papilla, caudal midline near the foramen caecum (week 6 to 7 - nerve fibers approach the lingual epithelium)

37
Stage 16 Stage16 bf1c.jpg Neural first parasympathetic ganglia, submandibular and ciliary, are identifiable PMID: 2751117

Limbs upper limb bud nerves median nerve, radial nerve and ulnar nerve entered into hand plate, myoblasts spindle shaped and oriented parallel to limb bud axis.

Heart outflow tract elliptical configuration with four cushions, the two larger fusing at this stage. Semilunar valve leaflets form at the downstream end of the cushions

Head lip and palate components of the upper lip, medial nasal prominence and maxillary process present, median palatine process appears.

38
   
39
   
40
   
41
Stage 17 Stage17 bf1c.jpg

Neural telencephalon areas of the future archicortex, paleocortex, and neocortex, visible. Beginning of future choroid plexus PMID: 2802187

Sense - Smell olfactory nerve fibres enter the brain PMID: 15604533

Neural primordium of the epidural space appears first on the ventral part of the vertebral canal and develops rostro-caudally PMID: 15478101

42
  Heart separation of common cardiac outflow (aortic arch and pulmonary aorta)


BGDsmall.jpg

Practical 6: Week 3 | Week 4 | Week 5 | Week 6 | Week 7 | Week 8 | Quiz



Glossary Links

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2010 BGD: Lecture 1 | Lecture 2 | Practical 3 | Practical 6 | Practical 12

Cite this page: Hill, M.A. (2019, December 6) Embryology 2010 BGD Practical 6 - Week 6. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/2010_BGD_Practical_6_-_Week_6

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© Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G