2011 Lab 10
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
- 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".
Tooth Stages
Tooth development stages[1]
Stage | Human (weeks) | |
lamina | Week 6 | |
placode | Week 7 | |
bud | Week 8 | |
cap | Week 11 | |
bell | Week 14 | |
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
Individual Assessment
Group Project
- Peer Assessment of your project should now appear on your group discussion page.
- Now you can make changes to your project based upon these reviews and your own concepts of how the project can be improved.
- At this time it is important that you interact with other group members to ensure they agree on the changes you may make.
- You may add additional content to your project.
- Look through the comments made by your peers and assemble a summary of good (positive) and bad (negative) feedback on your project.
- What are the common features of peer comments?
- Fix those minor problems (formatting, image size, image labelling, text, referencing)
- Are there parts of your project where group members have not worked appropriately or contributed their work?
- I will initially be discussing this with the groups individually. You will also have the opportunity to "feed back" contribution issues.
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?
References
- ↑ <pubmed>19266065</pubmed>| PMCID: PMC2651620
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 19) 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