File:Stage14compare23.jpg: Difference between revisions

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===Week 5 - Carnegie Stage 14===
===Week 5 - Carnegie Stage 14===
* Facts: Week 5, 31 - 35 days, 5 - 7 mm
* Facts: Week 5, 31 - 35 days, 5 - 7 mm
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* Identify: midbrain region, nasal placode, lens pit, 1st, 2nd and 3rd pharyngeal arches, 1st pharyngeal groove, maxillary and mandibular components of 1st pharyngeal arch, fourth ventricle of brain, heart prominence, cervical sinus, upper limb bud, mesonephric ridge, lower limb bud, umbilical cord
* Identify: midbrain region, nasal placode, lens pit, 1st, 2nd and 3rd pharyngeal arches, 1st pharyngeal groove, maxillary and mandibular components of 1st pharyngeal arch, fourth ventricle of brain, heart prominence, cervical sinus, upper limb bud, mesonephric ridge, lower limb bud, umbilical cord


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===Week 8 - Carnegie Stage 23===
===Week 8 - Carnegie Stage 23===


Revision as of 00:09, 11 December 2013

Human Embryo Size Comparison

The image compares the size of the embryo at 5 weeks (Stage 14) to that at 8 weeks (Stage 32). These stages represent approximately the middle and at the end of the embryonic period. The embryo images have been scaled to the same magnification (5 mm scale bar).


Links: Carnegie stage 14 | Carnegie stage 23 | Week 5 | Week 8 | Embryonic Development
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Week 5 - Carnegie Stage 14

  • Facts: Week 5, 31 - 35 days, 5 - 7 mm
  • View: Lateral view. Amniotic membrane removed.
  • Features: midbrain, nasal placode, lens pit, 1,2,3 pharyngeal arches, fourth ventricle of brain, 1st pharyngeal groove, heart prominence, cervical sinus, upper limb bud, mesonephric ridge, lower limb bud, umbilical cord
  • Identify: midbrain region, nasal placode, lens pit, 1st, 2nd and 3rd pharyngeal arches, 1st pharyngeal groove, maxillary and mandibular components of 1st pharyngeal arch, fourth ventricle of brain, heart prominence, cervical sinus, upper limb bud, mesonephric ridge, lower limb bud, umbilical cord
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Week 8 - Carnegie Stage 23

  • Facts: Week 8, 56 - 60 days, 27 - 31 mm
  • View: Lateral view. Amniotic membrane removed.
  • Features: scalp vascular plexus, eylid, eye, nose, auricle of external ear, mouth, sholder, arm, elbow, wrist, toes separated, sole of foot, umbilical cord


Image Source: UNSW Embryology, no reproduction without permission.

© Dr Mark Hill, Image cannot be reproduced without permission.

File history

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Date/TimeThumbnailDimensionsUserComment
current20:56, 13 May 2009Thumbnail for version as of 20:56, 13 May 2009593 × 601 (32 KB)MarkHill (talk | contribs)Human Embryo comparison of embryo sizes between Stage 14 and Stage 23 http://embryology.med.unsw.edu.au/wwwhuman/Stages/Images/stage14compare23.jpg Image source: UNSW Embryology © Dr Mark Hill, Image cannot be reproduced without permission.

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