File:ORahilly1987 fig20-2.jpg

From Embryology

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Fig. 20-2. Head Superficial Vascular Plexus - Stages 20-23

Composite drawing showing the edge of the superficial vascular plexus in the head at stages 20-23.

A subcutaneous capillary plexus that spreads upward toward the vertex of the head is a conspicuous feature of specimens measuring from about 20-24 mm in length.

The transition from vascular to avascular mesoderm is more gradual in earlier stages and becomes more abrupt later.

Numbers refer to specific Carnegie embryos.

Links: Week 8 | Carnegie stage 20 | Carnegie stage 21 | Carnegie stage 22 | Carnegie stage 23



Stage 20 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Category:Carnegie Stage 20 | Next Stage 21
  Historic Papers: 1914 head | 1954 Stage 19-23
Stage 21 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Madrid Embryos | Category:Carnegie Stage 21 | Next Stage 22
  Historic Papers: 1897 Coelom | 1911 Larynx | 1954 Stage 19-23
Stage 22 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Madrid Embryos | Category:Carnegie Stage 22 | Next Stage 23
Week 8, GA week 10, 54 - 56 days, CRL 23 - 28 mm, Carnegie Embryos
  Historic Papers: 1914 | 1954 Stage 19-23
Stage 23 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Madrid Embryos | Category:Carnegie Stage 23 | Next Fetal Development
  Historic Papers: 1954 Stage 19-23



1987 Stages: Introduction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | References | Appendix 1 | Appendix 2 | Historic Papers | Embryonic Development



Cite this page: Hill, M.A. (2024, April 15) Embryology ORahilly1987 fig20-2.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:ORahilly1987_fig20-2.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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