BGDA Practical 12 - Embryo to Fetus: Difference between revisions
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==Week 10 - Fetus (40mm)== | ==Week 10 - Fetus (40mm)== |
Revision as of 18:00, 25 May 2016
Practical 12: Embryo to Fetus | Second Trimester | Third Trimester | Birth | Neonatal | Abnormalities |
Introduction
Identify the development and form of the week 8 embryo (Stage 22 and 23). This 3D reconstruction animations showing specific systems and the histological sections from which these were prepared. There are also virtual slides and selected cross-sections showing specific features.
Then look at the week 10 early fetus and observe developmental changes. The selected mid-sagittal section shows the overall fetal anatomy and the gallery of excerpts have further detailed descriptions of these regions.
Week 8 - Stage 22
stage 22, Week 8, 54 - 56 days, 23 - 28 mm
Mesoderm: heart prominence, ossification continues Head: nose, eye, external acoustic meatus Body:straightening of trunk, heart, liver, umbilicus: placental cord, midgut herniation, allantois, vitelline duct Limb: upper limbs longer and bent at elbow, foot plate with webbed digits, wrist, hand plate with separated digits Straightening of trunk, pigmented eye, eyelid, nose, external acoustic meatus, ear auricle, scalp vascular plexus, separated digits (fingers), thigh, ankle, umbilical cord |
Embryo Anatomy
Now examine selected regions of the Stage 22 embryo and their overall development in the 3D animations.
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Week 8 - Stage 23
Week 8, 56 - 60 days, 27 - 31 mm
scalp vascular plexus, eylid, eye, nose, auricle of external ear, mouth, sholder, arm, elbow, wrist, toes separated, sole of foot, umbilical cord Mesoderm: ossification continues Head: eyelids, external ears, rounded head Body: straightening of trunk, intestines herniated at umbilicus Limbs: hands and feet turned inward |
Virtual Slides
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Week 10 - Fetus (40mm)
There are 4 sections taken in the sagittal plane (moving from the right at Plane A towards the midline at Plane D). Click on the small images (or the text below) to open the linked large image pages.
Midgut Herniation
Related Images
Fetus (week 10) Planes A (most lateral), B (lateral), C (medial) and D (midline) from lateral towards the midline.
- Human Fetus - most lateral | lateral | medial | midline
- Head - most lateral | lateral | medial | midline
- Cerebellum - most lateral | lateral | medial | midline
- Urogenital Unlabelled - most lateral | lateral | medial | midline
- Urogenital Labelled - most lateral | lateral | medial | midline
- Large Images - midline
- Image Source: UNSW Embryology, no reproduction without permission.
Practical 12: Embryo to Fetus | Second Trimester | Third Trimester | Birth | Neonatal | Abnormalities |
Additional Information
Links: Fetal Development - 10 Weeks | Stage 22 embryo slices
BGDA: Lecture 1 | Lecture 2 | Practical 3 | Practical 6 | Practical 12 | Lecture Neural | Practical 14 | Histology Support - Female | Male | Tutorial
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, June 1) Embryology BGDA Practical 12 - Embryo to Fetus. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDA_Practical_12_-_Embryo_to_Fetus
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G