BGDB Face and Ear - Fetal: Difference between revisions
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==Fetal Growth== | |||
In this cartoon movie of fetal growth, observe the changing relative sizes of the head and body. | |||
Then consider fetal skeletal changes occurring within the head associated with ossification processes and palate development. | |||
Finally consider fetal changes that are occurring in auditory pathway. | |||
{{BGDB Face}} | |||
==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. | |||
In this lateral (external) view, note the distribution of new bone formation by intramembranous ossification in the plates of the cranial vault, temporal bone, orbit, upper jaw (maxilla) and lower jaw (mandible) regions. (More? Skull | Face) Bony regions in the lower jaw (mandible) region also show spaces where tooth formation is occuring. | |||
In this medial (internal) view, note the distribution of cartilage from the nasal region through the base of the skull showing endochondral ossification, also occuring in the atlas/axis (with new bone forming). See also the original Meckel's cartilage within the newly forming bony mandible. | |||
==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. | |||
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Revision as of 09:22, 7 April 2011
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Fetal Growth
In this cartoon movie of fetal growth, observe the changing relative sizes of the head and body.
Then consider fetal skeletal changes occurring within the head associated with ossification processes and palate development.
Finally consider fetal changes that are occurring in auditory pathway.
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
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.
In this lateral (external) view, note the distribution of new bone formation by intramembranous ossification in the plates of the cranial vault, temporal bone, orbit, upper jaw (maxilla) and lower jaw (mandible) regions. (More? Skull | Face) Bony regions in the lower jaw (mandible) region also show spaces where tooth formation is occuring.
In this medial (internal) view, note the distribution of cartilage from the nasal region through the base of the skull showing endochondral ossification, also occuring in the atlas/axis (with new bone forming). See also the original Meckel's cartilage within the newly forming bony mandible.
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.
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Cite this page: Hill, M.A. (2024, May 4) Embryology BGDB Face and Ear - Fetal. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Fetal
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G