ANAT2241 Glandular Epithelia: Difference between revisions
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{{ANAT2241 header}} | {{ANAT2241 header}} | ||
==General Objective== | ==General Objective== | ||
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* Examine the following virtual slides, identify draw and label the following types of glands. | * Examine the following virtual slides, identify draw and label the following types of glands. | ||
[ | [https://moodle.telt.unsw.edu.au/mod/book/view.php?id=789982&chapterid=100760 Glandular Epithelia] | [[Media:Basic_Histo_diagrams_labelled_in_colour_-_2005.pdf|Histology Drawings]] | ||
==Histology Stains== | |||
{{Common Stains collapsetable}} | |||
==Gland Secretion Mechanisms== | ==Gland Secretion Mechanisms== | ||
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| width=200px|[[File:Holocrine secretion animation.gif|150px]] | | width=200px|[[File:Holocrine secretion animation.gif|150px]] | ||
|- | |- | ||
| Merocrine secretion | | Merocrine (eccrine) secretion | ||
| Apocrine secretion | | Apocrine secretion | ||
| Holocrine secretion | | Holocrine secretion | ||
|} | |} | ||
==Respiratory Epithelium== | |||
[[File:Respiratory histology 11.jpg|400px]] | |||
Pseudostratified columnar and ciliated. This type of epithelium is characteristic for all conductive passages dedicated to the respiratory system and therefore also called '''respiratory epithelium'''. | |||
==Stomach== | |||
Secretory sheath (sheet) | |||
[[File:Stomach histology 001.jpg|400px]][[File:Stomach histology 006.jpg|400px]] | |||
==Salivary Glands== | |||
[[File:Parotid gland histology 01.jpg|300px|thumb|Parotid gland histology]] | |||
Large salivary glands form 3 paired groups: | |||
# sublingual glands (beneath the tongue and embedded in oral cavity connective tissue) | |||
# submandibular glands | |||
# parotid glands (lie outside the oral cavity) | |||
<br><br> | |||
===Tubuloacinar Glands=== | |||
* have secretory acini | |||
* also the first part of the duct system from the acini participates in secretory process | |||
* salivary glands are divided by connective tissue septa into '''lobes''' | |||
** further subdivided into '''lobules''' | |||
<br><br> | |||
===Ducts=== | |||
{| | |||
| [[File:Gland duct histology cartoon.jpg|400px]] | |||
| | |||
* '''Interlobular''' and '''interlobar''' ducts - embedded in the connective tissue surrounding the lobes and lobules of the glands | |||
** stratified cuboidal or stratified columnar epithelium | |||
** stratified squamous epithelium at the oral cavity opening | |||
* '''Intralobular''' ducts - in between the secretory acini within the lobules | |||
* Intercalated ducts - difficult to identify in mucous glands | |||
* Striated ducts - absent in purely mucous glands | |||
|} | |||
{| | |||
! Parotid Ducts | |||
|- | |||
| [[File:Parotid_gland_histology_05.jpg|300px]] | |||
| [[File:Parotid_histology_stratified_columnar_01.jpg|300px]] | |||
| [[File:Parotid_gland_histology_03.jpg|300px]] | |||
|- | |||
| Interlobar duct | |||
| Interlobar duct epithelium | |||
| Intercalated duct | |||
|} | |||
===Serous and Mucous=== | |||
{| | |||
! Serous acini | |||
! Mucous acini | |||
|- | |||
| valign=top| | |||
* round or slightly ovoid nucleus placed basally | |||
* {{HE}} - apical cytoplasm appears pinkish/red containing reddish granules | |||
| valign=top| | |||
* flattened nuclei "pressed" against basal surface | |||
* secretory vesicles fill the apical cytoplasm | |||
* apical cytoplasm appears "spongy" | |||
** secretory product dissolved during staining process or remains unstained | |||
|} | |||
{| | |||
| [[File:Parotid_gland_histology_06.jpg|300px]] | |||
| [[File:Parotid_gland_histology_04.jpg|300px]] | |||
| [[File:Sublingual gland histology 02.jpg|300px]] | |||
|- | |||
| Serous acini and interlobular ducts | |||
| Serous acini secretory granules (zymogen granules) | |||
| Serous demilune | |||
|} | |||
==Integumentary Glands== | ==Integumentary Glands== | ||
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File:Integumentary-_sebaceous_gland_histology_01.jpg|Sebaceous Gland | File:Integumentary-_sebaceous_gland_histology_01.jpg|Sebaceous Gland | ||
</gallery> | </gallery> | ||
==Pancreas - Exocrine and Endocrine== | ==Pancreas - Exocrine and Endocrine== | ||
{| | |||
! Exocrine | |||
! Endocrine | |||
|- | |||
| width=410px|[[File:Pancreas_histology_002.jpg|400px]] | |||
| [[File:Pancreas_histology_003.jpg|400px]] | |||
|- | |||
| | |||
| Pancreatic islets (islets of Langerhans) | |||
|} | |||
<gallery> | <gallery> |
Latest revision as of 15:11, 7 June 2019
ANAT2241 This practical support page content is not part of the virtual science practical class and provides additional information for student self-directed learning purposes. All practical class pages are located on Moodle - ANAT2241 |
General Objective
To recognise exocrine and endocrine glandular epithelium.
Specific Objectives
- To know the morphological characteristics of mucous and serous secretory cells.
- To identify the following types of exocrine glands: unicellular (Goblet cell), secretory sheet, simple tubular (straight and coiled), simple and branched alveolar (acinar) glands, compound tubular and tubulo-alveolar (tubulo-acinar) glands.
- To recognise the different arrangement of endocrine glands when compared to exocrine glands.
Learning Activities
- The arrangement of the gland cells and the presence or absence of branched ducts.
- Examine the following virtual slides, identify draw and label the following types of glands.
Glandular Epithelia | Histology Drawings
Histology Stains
Common Histology Stains | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Gland Secretion Mechanisms
Merocrine (eccrine) secretion | Apocrine secretion | Holocrine secretion |
Respiratory Epithelium
Pseudostratified columnar and ciliated. This type of epithelium is characteristic for all conductive passages dedicated to the respiratory system and therefore also called respiratory epithelium.
Stomach
Secretory sheath (sheet)
Salivary Glands
Large salivary glands form 3 paired groups:
- sublingual glands (beneath the tongue and embedded in oral cavity connective tissue)
- submandibular glands
- parotid glands (lie outside the oral cavity)
Tubuloacinar Glands
- have secretory acini
- also the first part of the duct system from the acini participates in secretory process
- salivary glands are divided by connective tissue septa into lobes
- further subdivided into lobules
Ducts
Parotid Ducts | ||
---|---|---|
Interlobar duct | Interlobar duct epithelium | Intercalated duct |
Serous and Mucous
Serous acini | Mucous acini |
---|---|
|
|
Serous acini and interlobular ducts | Serous acini secretory granules (zymogen granules) | Serous demilune |
Integumentary Glands
Pancreas - Exocrine and Endocrine
Exocrine | Endocrine |
---|---|
Pancreatic islets (islets of Langerhans) |
Course Links
- Histology 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 | ANAT2241 Support | Histology | Histology Stains | Embryology Glossary
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Practical Support
- Pages can be accessed from any internet connected computer.
ANAT2241 Support Links: The Virtual Microscope | Covering and Lining Epithelia | Glandular Epithelia | CT Components | CT Types | Bone, Bone Formation and Joints | Muscle | Nervous | Blood | Eye | Cardiovascular | Respiratory | Integumentary | Gastrointestinal | Gastrointestinal Organs | Lymphatic and Immune | Endocrine | Urinary | Female Reproductive | Male Reproductive | Histology Stains | Histology Drawings | Practicals Health and Safety 2013 | Moodle - 2019
ANAT2241 This practical support page content is not part of the science practical class and provides only background information for student self-directed learning purposes.
Cite this page: Hill, M.A. (2024, June 17) Embryology ANAT2241 Glandular Epithelia. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/ANAT2241_Glandular_Epithelia
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G