2010 BGD Practical 6 - Week 8: Difference between revisions

Revision as of 15:16, 13 May 2010

Introduction

Key Events of Human Development during the eighth week (week 8) following fertilization or Clinical week 10 (LMP).

Day	Stage	Event
50	Stage 20	Head scalp vascular plexus visible Limb upper limbs begin to rotate ventrally Neural amygdaloid body has at least four individual nuclei PMID: 2268071 oculomotor nerve shows a dorsolateral and a ventromedial portion rhombic lip (rhombencephalon) formation of the cerebellum (intermediate layer) and of the cochlear nuclei cerebellum cell layer (future Purkinje cells) develops choroid plexuses of the fourth and lateral ventricles
51		Gastrointestinal Tract anal membrane perforates
52	Stage 21	Neural cortical plate appears in the area of future insula PMID: 2252222 Limb upper and lower limbs rotate Intraembryonic Coelom pericardioperitoneal canals close
53
54	Stage 22	Neural neocortical fibres project to epithalamus, to dorsal thalamus, and to mesencephalon PMID: 2252222 Limb fingers and toes lengthen Sense - Smell Stage 22 to early fetal period - migratory streams of neurons from the subventricular zone of the olfactory bulb towards the future claustrum PMID: 15604533
55		Genital 8 Weeks Testis - mesenchyme, interstitial cells (of Leydig) secrete testosterone, androstenedione Genital 8 to 12 Weeks - hCG stimulates testosterone production Tongue Week 8 - nerves penetrate epitheilai basal lamina and synapse with undifferentiated, elongated, epithelial cells (taste bud progenitor cell)
56	Stage 23	[1]Stage 23 defines the end of the embryonic (organogenesis) period Mesoderm heart prominence, ossification continues Head nose, eye, external acoustic meatus, eyelids, external ears, rounded head Body - straightening of trunk, heart, liver, umbilical cord, intestines herniated at umbilicus Limb upper limbs longer and bent at elbow, hands and feet turned inward, foot with separated digits, wrist, hand with separated digits Extraembryonic Coelom chorionic cavity is now lost by fusion with the expanding amniotic cavity Neural rhombencephalon, pyramidal decussation present, nuclei and tracts similar to those present in the newborn cerebellum present as only a plate connected to midbrain and hindbrain through fibre bundles PMID: 2244584 Axial Skeleton vertebral column 33 or 34 cartilaginous vertebrae (20-33 mm in total length), vertebral pedicles, articular and transverse processes identifiable (no spinous processes) PMID: 7216919
	Week 8	GIT - Stomach - Week 8 - Gastrin containing cells in stomach antrum. Somatostatin cells in both the antrum and the fundus.

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

Cite this page: Hill, M.A. (2024, April 25) Embryology 2010 BGD Practical 6 - Week 8. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/2010_BGD_Practical_6_-_Week_8

What Links Here?

@@ Line 2: / Line 2: @@
 {{Template:2010BGDLab6}}
+Key Events of Human Development during the eighth week (week 8) following fertilization or Clinical week 10 (LMP).
+{| class="prettytable"
+| <center>'''Day'''</center>
+| <center>'''Stage'''</center>
+| '''Event'''
+|-
+| <center>50</center>
+| [[Carnegie stage 20|Stage 20]]
+| [[File:Stage20_bf1c.jpg|200px|link=Carnegie stage 20]]
+[http://embryology.med.unsw.edu.au/Notes/head.htm Head]  scalp vascular plexus visible
+[http://embryology.med.unsw.edu.au/Notes/skmus7.htm Limb]  upper limbs begin to rotate ventrally
+[http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  amygdaloid body has at least four individual nuclei [http://www.ncbi.nlm.nih.gov/pubmed/2268071 PMID: 2268071]
+oculomotor nerve shows a dorsolateral and a ventromedial portion
+rhombic lip (rhombencephalon) formation of the cerebellum (intermediate layer) and of the cochlear nuclei
+cerebellum cell layer (future Purkinje cells) develops
+choroid plexuses of the fourth and lateral ventricles
+|-
+| <center>51</center>
+| &nbsp;
+| [http://embryology.med.unsw.edu.au/Notes/git.htm Gastrointestinal Tract]  anal membrane perforates
+|-
+| <center>52</center>
+| [[Carnegie stage 21|Stage 21]]
+| [[File:Stage21_bf1c.jpg|200px|link=Carnegie stage 21]]
+[http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  cortical plate appears in the area of future insula [http://www.ncbi.nlm.nih.gov/pubmed/2252222 PMID: 2252222]
+[http://embryology.med.unsw.edu.au/Notes/skmus7.htm Limb]  upper and lower limbs rotate
+[http://embryology.med.unsw.edu.au/Notes/coelom.htm Intraembryonic Coelom]  pericardioperitoneal canals close
+|-
+| <center>53</center>
+| &nbsp;
+| &nbsp;
+|-
+| <center>54</center>
+| [[Carnegie stage 22|Stage 22]]
+| [[File:Stage22_bf1c.jpg|200px|link=Carnegie stage 22]][http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  neocortical fibres project to epithalamus, to dorsal thalamus, and to mesencephalon [http://www.ncbi.nlm.nih.gov/pubmed/2252222 PMID: 2252222]
+[http://embryology.med.unsw.edu.au/Notes/skmus7.htm Limb]  fingers and toes lengthen
+[http://embryology.med.unsw.edu.au/Notes/nose.htm Sense - Smell]  Stage 22 to early fetal period - migratory streams of neurons from the subventricular zone of the olfactory bulb towards the future claustrum [http://www.ncbi.nlm.nih.gov/pubmed/15604533 PMID: 15604533]
+|-
+| <center>55</center>
+|
+| [http://embryology.med.unsw.edu.au/Notes/genital.htm Genital ]8 Weeks  Testis - mesenchyme, interstitial cells (of Leydig) secrete testosterone, androstenedione
+[http://embryology.med.unsw.edu.au/Notes/genital.htm Genital ]8 to 12 Weeks - hCG stimulates testosterone production
+[http://embryology.med.unsw.edu.au/Notes/tongue.htm Tongue]  Week 8 - nerves penetrate epitheilai basal lamina and synapse with undifferentiated, elongated, epithelial cells (taste bud progenitor cell)
+|-
+| <center>56</center>
+| [[Carnegie stage 23|Stage 23]]
+| [[File:Stage23_bf1c.jpg|200px|link=Carnegie stage 23]] [http://embryology.med.unsw.edu.au/wwwhuman/Stages/Stage23L.htm  ]Stage 23 defines the end of the embryonic (organogenesis) period
+'''Mesoderm ''' heart prominence, ossification continues
+[http://embryology.med.unsw.edu.au/Notes/head.htm Head]  nose, eye, external acoustic meatus, eyelids, external ears, rounded head
+'''Body '''- straightening of trunk, heart, liver, umbilical cord, intestines herniated at umbilicus
+[http://embryology.med.unsw.edu.au/Notes/skmus7.htm Limb]  upper limbs longer and bent at elbow, hands and feet turned inward, foot with separated digits, wrist, hand with separated digits
+'''Extraembryonic Coelom'''  chorionic cavity is now lost by fusion with the expanding amniotic cavity
+[http://embryology.med.unsw.edu.au/Notes/neuron.htm Neural]  rhombencephalon, pyramidal decussation present, nuclei and tracts similar to those present in the newborn cerebellum present as only a plate connected to midbrain and hindbrain through fibre bundles [http://www.ncbi.nlm.nih.gov/pubmed/2244584 PMID: 2244584]
+[http://embryology.med.unsw.edu.au/Notes/skmus8.htm Axial Skeleton]  vertebral column 33 or 34 cartilaginous vertebrae (20-33 mm in total length), vertebral pedicles, articular and transverse processes identifiable (no spinous processes) [http://www.ncbi.nlm.nih.gov/pubmed/7216919 PMID: 7216919]
+|-
+| <center>&nbsp;</center>
+| Week 8
+| [http://embryology.med.unsw.edu.au/Notes/git10.htm GIT - Stomach] - Week 8 - Gastrin containing cells in stomach antrum. Somatostatin cells in both the antrum and the fundus.
+|}
@@ Line 9: / Line 99: @@
 {{Template:BGDFooter2010}}
+[[Category:Week 8]]