author(s): university of michigan medical school ... · layers of the digestive tract digestive...
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M1 - GI Sequence
Oral Cavity and Salivary glands
Winter, 2009 Cell and Developmental biology
Wheater 14.1
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Layers of the Digestive Tract Digestive Tube (GI tract) Mucosa (mucous membrane)
epithelium lamina propria musculris mucosa
Submucosa Muscularis Externa
inner-circular outer-longitudinal (3RD layer in stomach)
Serosa or adventitia Glands
- Glands within the GI Tract - Glands outside - Salivary glands, Liver, Pancreas
Wheater 14.1
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Oral Mucosa 1. Lining Mucosa: lip, cheek, floor of mouth,
soft palate, ventral surface of tongue Epithelium - non-keratinized Submucosa contains salivary glands
2. Masticatory Mucosa: gingiva, hard palate Epithelium - keratinized or parakeratinized Submucosa - absent
3. Specialized Mucosa: dorsal surface of tongue 1. Filiform Papillae – keratinized epithelium
2. Fungi form Papillae - non-keratinized epithelium 3. (Foliate Papillae) - rudimentary in human 4. Circumvallate Papillae – non-keratinized epithelium with
associated taste buds and von Ebner’s salivary glands
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Slide 115
Oral cavity
Vestibule Oral cavity proper
Michigan Medical School Histology Slide Collection
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Slide 114 Lip
Oral mucosa: St. sq. non-keratinized epithelium
Labial salivary glands in submucosa
Skin: Hair follicles sebaceous glands sweat glands
Vermillion border (zone) Dilated venules and veins lacks salivary glands
Orb
icul
aris
oris
mus
cle
Michigan Medical School Histology Slide Collection
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absence of salivary glands dilated vessels
Michigan Medical School Histology Slide Collection
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Muco-gingival Junction
Source Undetermined
Source Undetermined
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Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co.
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Tooth Structure
(95%)
(mineral content)
(65%)
(45-50%)
OrofacialHistologyandEmbryology,Moss-Salentijn,L.,etal.,F.A.DavisCo.
Cell and Tissue Biology, L. Weiss 6th Ed. Pp. 597
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Diagram of a tooth (incisor) in its alveolar
socket
Sam Fentress, Wikimedia Commons Source Undetermined
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Teeth in Alveolar Bone (Sockets)
Source Undetermined
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Periodontal Ligaments (fibers)
Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co
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Cellular Cementum,
Cementocytes, and Dentin
Dentin
Cementum
Orofacial Histology and Embryology Moss-Salentijn, L., et al., F.A. Davis Co
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Deciduous and Permanent Teeth
Source Undetermined
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Forming Tooth
Dentin
Enamel
Michigan Medical School Histology Slide Collection
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Source Undetermined
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Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co
Cormack D., p.485
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Erosion of Enamel and Cavity Formation
Source Undetermined
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Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co
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Weiss/Greep, Histology, 4th ed. P.637 Drosenbach, Wikipedia
The Epithelial Attachment
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Indiana University
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X-section of the Tongue
Intrinsic and Extrinsic Muscles Source Undetermined
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Filiform and Fungiform Papillae
Non-keratinized epithelium with secondary papillae and scattered taste buds.
Keratinized epithelium, no taste buds
Source Undetermined
Source Undetermined
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Abnormal Keratinization of Filiform Papillae
Geographic tongue
Hairy tongue Over keratinized
Under keratinized
Source Undetermined
Source Undetermined
Source Undetermined
Source Undetermined
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Circumvallate papillae and Taste Buds
US Federal Government, Wikipedia
NEUROtiker, Wikimedia Commons
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A Visual Approach to Histology, Wismar and Ackerman
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Taste Buds
Source Undetermined
NEUROtiker, Wikimedia Commons
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Bloom and Fawcett, Histology, p. 568
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Areas of Taste Perception
Wela49, Wikimedia Commons
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Major Salivary Glands
1. Parotid
2. Submandibular
3. Sublingual
US Federal Government, Wikimedia Commons
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Saliva Secretion About 1,000 ml/day
Submandibular Glands 65% Parotid Glands 23% Sublingual Glands 4% Minor Salivary Glands 8%
Flow Rate 0.3 ml/min (Unstimulated)
Stimulation Autonomic Nervous System
Composition Varies with flow rate
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Composition of Saliva
Water Ions: Bicarbonate, potassium, sodium, chloride, etc Glycoproteins: Mucus Proteins: Enzymes – Amylase (parotid gland), nucleases,
etc. Cells: Desquamated Epithelial cells
Leukocytes pH: ~ 7.0
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GlandularLobulesandLobesManyLobulesformaLobe
Acini,Intralobularduct,InterlobularductKierszenbaump.53
Text/Atlas of Histology, Philadelphia, WB Saunders, 1968
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Structural and functional Unit of Salivary Gland
Source Undetermined
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Myoepithelial Cell
Kim, SK
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Gray’s Anatomy, Wikimedia Commons
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Mixed, Sero-mucous Gland
Mucous acini
Serous acini
Michigan Medical School Histology Slide Collection
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Submandibular and Sublingual Gland
Michigan Medical School Histology Slide Collection Michigan Medical School Histology Slide Collection
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Michigan Medical School Histology Slide Collection
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Parotid gland
Michigan Medical School Histology Slide Collection Michigan Medical School Histology Slide Collection
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Serous (parotid) Acinar Cells
Kim, SK
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Innervations of the Acinar Cells
Salivary Gland secretion is regulated by the autonomic nervous System NE: Nerve endings of
postganglionic fibers
NE
NE
Hand, A.R., J. Cell Biol. 47:541, 1970
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Exocytosis
Kim, S.K. Bloom and Fawcett p. 695 Kim, S.K.
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Intercalated (blue) and Striated (green) Ducts
Michigan Medical School Histology Slide Collection
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Salivary Gland Ducts
Source Undetermined
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EM of Striated Duct Cells
Source Undetermined
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Role of Striated Ducts in Saliva Production
Image of ion flow through striated ducts removed
Regents of the University of Michigan
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Junqueira/Carneiro 3rd ed. P. 340
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Intra and Inter Lobular Ducts
Source Undetermined
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Intra (left) and Inter (right) Lobular Ducts
Michigan Medical School Histology Slide Collection
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Slide 3: Wheater 14.1 Slide 4: Wheater 14.1 Slide 6: Michigan Medical School Histology Slide Collection Slide 7: Michigan Medical School Histology Slide Collection Slide 8: Michigan Medical School Histology Slide Collection Slide 9: Sources Undetermined Slide 10: Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co. Slide 11: Cell and Tissue Biology, L. Weiss 6th Ed. Pp. 597; Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co. Slide 12: Sam Fentress, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:ToothSection.jpg, CC: BY-SA
http://creativecommons.org/licenses/by-sa/2.0; Source Undetermined Slide 13: Source Undetermined Slide 14: Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co Slide 15: Orofacial Histology and Embryology; Moss-Salentijn, L., et al., F.A. Davis Co Slide 16: Sources Undetermined Slide 17: Michigan Medical School Histology Slide Collection Slide 18: Source Undetermined Slide 19: Orofacial Histology and Embryology, Moss-Salentijn, L., et al., F.A. Davis Co; Cormack D., p.485 Slide 20: Source Undetermined Slide 21: Orofacial Histology and Embryology; Moss-Salentijn, L., et al., F.A. Davis Co Slide 22: Drosenbach, Wikipedia, http://en.wikipedia.org/wiki/File:The_Periodontium.jpg; Weiss/Greep, Histology, 4th ed. P.637 Slide 23: Indiana University, http://anatomy.iupui.edu/courses/histo_D502/D502f04/lecture.f04/upperdigf04/uppergif04.html Slide 24: Source Undetermined Slide 25: Sources Undetermined Slide 26: Sources Undetermined Slide 27: US Federal Government, Wikipedia, http://en.wikipedia.org/wiki/File:Illu04_tongue.jpg; NEUROtiker, Wikimedia Commons,
http://commons.wikimedia.org/wiki/File:Taste_bud.svg, CC: BY-SA 3.0, http://creativecommons.org/licenses/by-sa/3.0/ Slide 28: A Visual Approach to Histology, Wismar and Ackerman Slide 29: Source Undetermined; NEUROtiker, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Taste_bud.svg, CC: BY-SA 3.0,
http://creativecommons.org/licenses/by-sa/3.0/ Slide 30: Bloom and Fawcett, Histology, p. 568 Slide 31: Wela49, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Tongue_flavor.jpg, CC: BY-SA 30
http://creativecommons.org/licenses/by-sa/3.0/ Slide 32: US Federal Government, Wikimedia Commons, http://en.wikipedia.org/wiki/File:Illu_quiz_hn_02.jpg Slide 35: Text/Atlas of Histology, Philadelphia, WB Saunders, 1968; Kierszenbaum p. 53 Slide 36: Source Undetermined Slide 37: Sun-Kee Kim
Additional Source Information for more information see: http://open.umich.edu/wiki/CitationPolicy
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Slide 38: Gray’s Anatomy Plate 1025, Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Gray1025.png Slide 39: Michigan Medical School Histology Slide Collection Slide 40: Michigan Medical School Histology Slide Collection Slide 41: Michigan Medical School Histology Slide Collection Slide 42: Michigan Medical School Histology Slide Collection Slide43:Sun-KeeKimSlide44:Hand, A.R., J. Cell Biol. 47:541, 1970 Slide45:Sun-KeeKim;Bloom and Fawcett p. 695 Slide46:MichiganMedicalSchoolHistologySlideCollectionSlide47:SourceUndeterminedSlide48:SourceUndeterminedSlide49:RegentsoftheUniversityofMichiganSlide50:Junqueira/Carneiro 3rd ed. P. 340 Slide51:SourceUndeterminedSlide52:MichiganMedicalSchoolHistologySlideCollection