BGDB Face and Ear - Late Embryo: Difference between revisions
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==Week 8== | ==Week 8== | ||
===Head Surface=== | |||
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! Bright Field | |||
! Scanning EM | |||
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| [[File:ME45 001.jpg|300px]] | |||
| [[File:ME45 002.jpg|500px]] | |||
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! colspan=2|<center>Magnetic Resonance Imaging</center> | |||
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<html5media height="400" width="612">File:Stage23 MRI 3D04.mp4</html5media> | |||
[[Media:Stage23 MRI 3D04.mp4|'''Click Here''' to play on mobile device]] | |||
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<gallery caption="Oral Cavity ([[Carnegie stage 23|stage 23]])"> | <gallery caption="Oral Cavity ([[Carnegie stage 23|stage 23]])"> | ||
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===Tongue=== | ===Tongue=== | ||
{{Tongue cartoon gallery}} | |||
Week 7 to 8 tongue and oral cavity. | Week 7 to 8 tongue and oral cavity. | ||
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| [[File:Human embryonic tongue 11.jpg|300px]] | | [[File:Human embryonic tongue 11.jpg|300px]] | ||
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Taste buds will develop and be located in the: fungiform papillae, foliate papillae, and circumvallate papillae. | |||
===Hearing=== | ===Hearing=== | ||
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[[File:External_ear_stages-14-23-adult.jpg|600px]] | [[File:External_ear_stages-14-23-adult.jpg|600px]] | ||
{{BGDB Practical 6 - Late Embryo Interactive}} | |||
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===Terms=== | |||
{{Head terms}} | |||
{{BGDBFooter}} | {{BGDBFooter}} |
Latest revision as of 20:56, 12 May 2019
Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Week 6
Primary Palate
- Beginning week 6 there is fusion of the upper lip.
- Formed by the maxillary prominences of of the first pharyngeal arch and the frontonasal prominence.
- Failure of this embryonic process leads to cleft lip.
Above images show face development through week 6 to week 7 (1 mm scale markings).
The animation shows the early fusion of the primary palate in the human embryo between stage 17 and 18, going from an epithelial seam to the mesenchymal bridge.
Week 8
Head Surface
Bright Field | Scanning EM |
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<html5media height="400" width="612">File:Stage23 MRI 3D04.mp4</html5media> |
Selected Head Images: B4 - Choroid Plexus | B5 - Cochlea | B6 - Cochlea
Palate
Tongue
Tongue Development Parts
Tongue Week 8, (GA week 10)
Week 7 to 8 tongue and oral cavity.
Stage 19 | Stage 21 | Stage 23 |
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Taste buds will develop and be located in the: fungiform papillae, foliate papillae, and circumvallate papillae.
Hearing
Behind that a pale cartilagenous region (that later ossifies) encloses the structuctures of the inner ear, beside which middle ear bones are forming. On the righthand side of the head the external ear is visible. The lower half of the image shows the developing brainstem with a large ventricular space occupied in part by an extensive choroid plexus (manufacturer of cerebrospinal fluid). |
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Embryonic External Ear
Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).
Late Embryo Interactive Component
Attempt the Quiz - Late Embryo | |
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Here are a few simple Quiz questions that relate to Late Embryo from the lecture and practical.
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Practical 6: Trilaminar Embryo | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities |
Additional Information
Additional Information - Content shown under this heading is not part of the material covered in this class. It is provided for those students who would like to know about some concepts or current research in topics related to the current class page. |
Cranial Nerves
Cranial Nerves | ||||
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Nerve Number | Name | Type | Origin | Function |
CN I | Olfactory | sensory | telencephalon | smell placode |
CN II | Optic | sensory | retinal ganglial cells | vision |
CN III | Oculomotor | motor | anterior midbrain | extraocular muscles eye movements and pupil dilation (motor) |
CN IV | Trochlear | motor | dorsal midbrain | extraocular muscles (superior oblique muscle) |
CN V | Trigeminal | motor/sensory | pons | touch, mastication |
CN VI | Abducent | motor | extraocular muscles | control eye movements (lateral rectus muscle) |
CN VII | Facial | motor/sensory | pons | facial expression, taste (tongue anterior and central regions) regulate salivary production. |
CN VIII | Acoustic | sensory | vestibular and cochlear nuclei | hearing, placode |
CN IX | Glossopharyngeal | motor/sensory | medulla | swallowing and speech, taste (tongue posterior region) |
CN X | Vagus | motor/sensory | medulla | larynx and pharynx muscles (speech and swallowing), regulates heartbeat, sweating, and peristalsis |
CN XI | Accessory | motor | motor neurons | sternocleidomastoid and trapezius muscles |
CN XII | Hypoglossal | motor | motor neurons | tongue muscles (speech, eating and other oral functions) |
Palate
Palate Development (expand to see terms) |
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Other Terms Lists |
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Terms Lists: ART | Birth | Bone | Cardiovascular | Cell Division | Endocrine | Gastrointestinal | Genital | Genetic | Head | Hearing | Heart | Immune | Integumentary | Neonatal | Neural | Oocyte | Palate | Placenta | Radiation | Renal | Respiratory | Spermatozoa | Statistics | Tooth | Ultrasound | Vision | Historic | Drugs | Glossary |
Historic
Streeter GL. On the development of the membranous labyrinth and the acoustic and facial nerves in the human embryo. (1906) Amer. J Anat. 6:139-165.
Terms
Head Terms (expand to view) |
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Other Terms Lists |
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Terms Lists: ART | Birth | Bone | Cardiovascular | Cell Division | Endocrine | Gastrointestinal | Genital | Genetic | Head | Hearing | Heart | Immune | Integumentary | Neonatal | Neural | Oocyte | Palate | Placenta | Radiation | Renal | Respiratory | Spermatozoa | Statistics | Tooth | Ultrasound | Vision | Historic | Drugs | Glossary |
BGDB: Lecture - Gastrointestinal System | Practical - Gastrointestinal System | Lecture - Face and Ear | Practical - Face and Ear | Lecture - Endocrine | Lecture - Sexual Differentiation | Practical - Sexual Differentiation | 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, May 8) Embryology BGDB Face and Ear - Late Embryo. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Face_and_Ear_-_Late_Embryo
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G