Revision as of 10:48, 29 September 2011

Endocrine and Integumentary

Historic Embryology - Endocrine
1903 Islets of Langerhans \| 1903 Pig Adrenal \| 1904 interstitial Cells \| 1908 Pancreas Different Species \| 1908 Pituitary \| 1908 Pituitary histology \| 1911 Rathke's pouch \| 1912 Suprarenal Bodies \| 1914 Suprarenal Organs \| 1915 Pharynx \| 1916 Thyroid \| 1918 Rabbit Hypophysis \| 1920 Adrenal \| 1935 Mammalian Hypophysis \| 1926 Human Hypophysis \| 1927 Adrenal \| 1927 Hypophyseal fossa \| 1930 Adrenal \| 1932 Pineal Gland and Cysts \| 1935 Hypophysis \| 1935 Pineal \| 1937 Pineal \| 1935 Parathyroid \| 1940 Adrenal \| 1941 Thyroid \| 1950 Thyroid Parathyroid Thymus \| 1957 Adrenal

Hair Links
Hair Links: Overview \| Lanugo \| Neonatal \| Vellus \| Terminal \| Hair Follicle \| Follicle Phases \| Stem Cells \| Molecular \| Pattern \| Puberty \| Histology \| Hair Colour \| Arrector Pili Muscle \| Hair Loss \| Integumentary

Touch Links
Touch Links: Touch Receptors \| Touch Pathway \| Pacinian Corpuscle \| Meissner's Corpuscle \| Merkel Cell \| Sensory Modalities \| Neural Crest Development \| Neural System Development \| Student project \| Integumentary \| Sensory System

Historic Embryology - Integumentary
1906 Papillary ridges \| 1910 Manual of Human Embryology \| 1914 Integumentary \| 1923 Head Subcutaneous Plexus \| 1921 Text-Book of Embryology \| 1924 Developmental Anatomy \| 1941 Skin Sensory \| Historic Disclaimer

Tinycc
http://tiny.cc/Integument_Development

Endocrine

Developing Pituitary - Human Embryo Carnegie stage 22

Begin by working through Endocrine Development by week 8.
Then look at the information on each endocrine organ on their information page.

Integumentary

Teeth

Fetal Head (12 weeks) lateral

Deciduous teeth

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".

Tooth Stages

Tooth development stages^[1]

Stage	Image	Human (weeks)	Mouse (days)
lamina		Week 6	E11
placode		Week 7	E11.5
bud		Week 8	E12.5
cap		Week 11	E14.5
bell		Week 14	E15.5

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

Lecture content is made available on the Monday of the associated lecture week.
Some guest lecturers will provide additional handouts or lecture notes.
For background information see Embryonic Development and Systems Notes
2011 Timetable | 2011 Students

--Mark Hill 06:47, 20 July 2011 (EST)

Course Content 2011

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

What Links Here?

↑ <pubmed>19266065</pubmed>| PMCID: PMC2651620

[PMID19266065-1] <pubmed>19266065</pubmed>| PMCID: PMC2651620

[1]

@@ Line 26: / Line 26: @@
 * tooth growth occurs in ossifying jaws
-'''odontoblasts'''
+'''odontoblasts''' - neural crest-derived mesenchymal cells which differentiate under the influence of the enamel epithelium. Cells secrete predentin, calcifies to form dentin.
-* neural crest-derived mesenchymal cells which differentiate under the influence of the enamel epithelium. Cells secrete predentin, calcifies to form dentin.
-'''ameloblasts'''
+'''ameloblasts''' - inner enamel epithelium forms pre-ameloblasts differentiate and produce enamel
-* inner enamel epithelium forms pre-ameloblasts differentiate and produce enamel
-'''periodontal ligament'''
+'''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.
-* 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'''
+[[File:Tooth_development_stage.jpg|thumb|Tooth development stages<ref name="PMID19266065"><pubmed>19266065</pubmed>| [http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2651620&tool=pmcentrez PMCID: PMC2651620]</ref>]]
+{|
+|-bgcolor="CEDFF2"
+| width= 100px |'''Stage'''
+| width= 210px |<center>'''Image'''</center>
+| width= 100px |'''Human''' (weeks)
+| width= 100px |'''[[Mouse Development|Mouse]]''' (days)
+|-
+| lamina
+| [[File:Tooth stage lamina.jpg|200px|lamina]]
+| [[Week 6]]
+| [[Mouse_Timeline_Detailed#Day_11_.28E11.0.29|E11]]
+|-bgcolor="F5FAFF"
+| placode
+| [[File:Tooth placode stage.jpg|200px|placode stage]]
+| [[Week 7]]
+| [[Mouse_Timeline_Detailed#Day_11.5_.28E11.5.29|E11.5]]
+|-
+| bud
+| [[File:Tooth bud stage.jpg|200px|bud stage]]
+| [[Week 8]]
+| E[[Mouse_Timeline_Detailed#Day_12_.28E12.0.29|12.5]]
+|-bgcolor="F5FAFF"
+|cap
+| [[File:Tooth cap stage.jpg|200px|cap stage]]
+| Week 11
+| [[Mouse_Timeline_Detailed#Day_14_.28E14.0.29|E14.5]]
+|-
+| bell
+| [[File:Tooth bell stage.jpg|200px|bell stage]]
+| Week 14
+| [[Mouse_Timeline_Detailed#Day_15_.28E15.0.29|E15.5]]
+|-bgcolor="F5FAFF"
+|
+|
+|
+|}
 === Teeth Postnatal ===

2011 Lab 10: Difference between revisions