ANAT2341 Lab 6 - Fetal
Lab 6: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
Fetal Growth
<html5media height="480" width="400">File:fetal growth.mp4</html5media>
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In this cartoon movie of fetal growth, observe the changing relative sizes of the head, body and limbs.
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Fetal Head Growth
Head Circumference Growth (both gestational and post-fertilisation ages are shown)
Skull Ossification
These are 2 views of the same 12 week 92 mm CRL human fetus head, double stained to show both cartilage (blue) and newly-formed bone (red). The head undergoes two different forms of ossification (endochondral and intramembranous) in separate regions of the skull.
Late Fetal Skull
Mandible Ossification
Face
The cartilage template of the mandible and the base of the skull are replaced by early bone development.
Selected midline medial head view showing key features of head musculoskeletal and neurological development.
Note extensive nasal cartilage, nasal conchae, pituitary, secondary palate, oral cavity, tongue, mandible, hyoid, choana, oropharynx.
Also note the developing tongue musculature and its mandibular attachment site.
Note that the cranial vault, the portion of the skull enclosing the brain, ossifies by a unique bone formation process, intramembranous ossification.
Because the head contains many different structures also review notes on Special Senses (eye, ear, nose), Respiration (pharynx), Integumentary (Teeth), Endocrine (thyroid, parathyroid, pituitary) and Musculoskeletal (tongue, skull).
Palate Development
Secondary palate formation is the growth of the palatal shelves towards the midline.
Inferior view | Anterior view |
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<html5media height="400" width="400">File:Palate_001.mp4</html5media> | <html5media height="400" width="400">File:Palate_002.mp4</html5media> |
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Palate Overview
Embryonic
Fetal
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Week 10 Gestational Age (GA week 12)
hard palate |
soft palate |
Lab 6: Introduction | Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | Online Assessment |
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 5) Embryology ANAT2341 Lab 6 - Fetal. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/ANAT2341_Lab_6_-_Fetal
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G