2011 Lab 10: Difference between revisions
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[[File:Stage 22 image 221.jpg|thumb|Developing Pituitary - Human Embryo Carnegie stage 22]] | [[File:Stage 22 image 221.jpg|thumb|Developing Pituitary - Human Embryo Carnegie stage 22]] | ||
* Begin by working through [[Endocrine_System_-_Carnegie_Stage_22|Endocrine Development by week 8]]. | * Begin by working through [[Endocrine_System_-_Carnegie_Stage_22|Endocrine Development by week 8]]. | ||
* Then look at the information on each endocrine organ on their information page. | |||
==Integumentary== | |||
===Teeth=== | |||
[[File:Fetal_head_lateral.jpg|thumb|Fetal Head (12 weeks) lateral]] | |||
[[File:Deciduous teeth.jpg|thumb|Deciduous teeth]] | |||
[[File:Permanent teeth.jpg|thumb|Permanent teeth]] | |||
* integumentary system specialization by epitheilal/mesenchymal interactions in development and develops with a major contribution from the neural crest. | |||
** ectoderm of the first pharyngeal arch and neural crest, ectomesenchymal cells. | |||
* week 6 - odontogenesis begins, tooth bud | |||
* 4 morphological stages describing the early tooth development: bud, cap, bell, and terminal differentiation | |||
* 2 sets of teeth: 20 deciduous teeth, 32 permanent teeth | |||
* differential rates of growth, shed at different times over 20 year period | |||
* ectoderm, mesoderm and neural crest mesenchyme contribute | |||
* inductive influence of neural crest with overlying ectoderm | |||
* tooth growth occurs in ossifying jaws | |||
'''odontoblasts''' | |||
* neural crest-derived mesenchymal cells which differentiate under the influence of the enamel epithelium. Cells secrete predentin, calcifies to form dentin. | |||
'''ameloblasts''' | |||
* inner enamel epithelium forms pre-ameloblasts differentiate and produce enamel | |||
'''periodontal ligament''' | |||
* tooth is not anchored directly onto its bony socket (alveolar bone) but held in place by the periodontal ligament (PDL), a specialized connective tissue structure that surrounds the tooth root coating of cementum. | |||
* ligament also act as; a shock absorber, transmitter of chewing forces (from tooth to bone), sensory information (heat, cold, pressure and pain). | |||
** collagen fiber bundles within the ligament are called "Sharpey's fibres". | |||
=== Teeth Postnatal === | |||
Deciduous teeth | |||
* '''6 - 24 months''' - erupt from gums by pushing toward surface | |||
* '''2 years''' - all deciduous teeth present | |||
Permanent teeth | |||
* 6 years until early adult | |||
* tooth bud lie in gums beneath deciduous teeth | |||
* osteoclasts resorb deciduous teeth roots | |||
* growth affects face shape | |||
:'''Links:''' [[Integumentary_System_-_Tooth_Development|Tooth Development]] | |||
==SOMS Summer Research Awards== | ==SOMS Summer Research Awards== |
Revision as of 10:46, 29 September 2011
Endocrine and Integumentary
Integumentary Links: integumentary | Lecture | hair | tooth | nail | integumentary gland | mammary gland | vernix caseosa | melanocyte | touch | Eyelid | outer ear | Histology | integumentary abnormalities | Category:Integumentary | |||||||||||
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Endocrine
- Begin by working through Endocrine Development by week 8.
- Then look at the information on each endocrine organ on their information page.
Integumentary
Teeth
- integumentary system specialization by epitheilal/mesenchymal interactions in development and develops with a major contribution from the neural crest.
- ectoderm of the first pharyngeal arch and neural crest, ectomesenchymal cells.
- week 6 - odontogenesis begins, tooth bud
- 4 morphological stages describing the early tooth development: bud, cap, bell, and terminal differentiation
- 2 sets of teeth: 20 deciduous teeth, 32 permanent teeth
- differential rates of growth, shed at different times over 20 year period
- ectoderm, mesoderm and neural crest mesenchyme contribute
- inductive influence of neural crest with overlying ectoderm
- tooth growth occurs in ossifying jaws
odontoblasts
- neural crest-derived mesenchymal cells which differentiate under the influence of the enamel epithelium. Cells secrete predentin, calcifies to form dentin.
ameloblasts
- inner enamel epithelium forms pre-ameloblasts differentiate and produce enamel
periodontal ligament
- tooth is not anchored directly onto its bony socket (alveolar bone) but held in place by the periodontal ligament (PDL), a specialized connective tissue structure that surrounds the tooth root coating of cementum.
- ligament also act as; a shock absorber, transmitter of chewing forces (from tooth to bone), sensory information (heat, cold, pressure and pain).
- collagen fiber bundles within the ligament are called "Sharpey's fibres".
Teeth Postnatal
Deciduous teeth
- 6 - 24 months - erupt from gums by pushing toward surface
- 2 years - all deciduous teeth present
Permanent teeth
- 6 years until early adult
- tooth bud lie in gums beneath deciduous teeth
- osteoclasts resorb deciduous teeth roots
- growth affects face shape
- Links: Tooth Development
SOMS Summer Research Awards
- The Research Support Committee is pleased to announce that it will again be offering Summer Research Awards (SRAs).
- These awards are for undergraduate students carrying out supervised research in SOMS between November 2011 and February 2012.
- Successful students will receive $250 per week for 6 weeks of research. More Information?
Co-ordinator Note
Dr Mark Hill |
ANAT2341 Embryology S2 2011
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Course Content 2011
2011 Timetable: | Embryology Introduction | Fertilization | Cell Division/Fertilization | Week 1 and 2 Development | Week 3 Development | Week 1 to 3 | Mesoderm Development | Ectoderm, Early Neural, Neural Crest | Trilaminar Embryo to Early Embryo | Early Vascular Development | Placenta | Vascular and Placenta | Endoderm, Early Gastrointestinal | Respiratory Development | Endoderm and Respiratory | Head Development | Neural Crest Development | Head and Neural Crest | Musculoskeletal Development | Limb Development | Musculoskeletal | Renal Development | Genital | Kidney and Genital | Sensory | Stem Cells | Stem Cells | Endocrine Development | Endocrine | Heart | Integumentary Development | Heart and Integumentary | Fetal | Birth and Revision | Fetal
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 29) Embryology 2011 Lab 10. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/2011_Lab_10
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G