Goblet cell |
Schematic illustration of a goblet cell in close up, illustrating different internal structures of the cell.
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Transverse section of a villus, from the human intestine. X 350.
a. Basement membrane, here somewhat shrunken away from the epithelium.
b. Lacteal.
c. Columnar epithelium.
d. Its striated border.
e. Goblet cells.
f. Leucocytes in epithelium.
f’. Leucocytes below epithelium.
g. Blood vessels.
h. Muscle cells cut across.
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Latin |
exocrimohsinocytus caliciformis |
Code |
TH H3.04.03.0.00009;
H3.04.03.0.00016
H3.05.00.0.00006 |
Anatomical terminology |
Goblet cells are glandular simple columnar epithelial cells whose function is to secrete gel forming mucins, which are the major component of mucus. They use both apocrine and merocrine methods for secretion.
The majority of the cell's cytoplasm is occupied by mucinogen granules, except at the bottom, where rough endoplasmic reticulum, mitochondria, the nucleus, and other organelles are concentrated. The apical plasma membrane projects microvilli to increase surface area for secretion.
Contents
- 1 Etymology
- 2 Locations
- 3 Histology
- 4 Types of secretion
- 4.1 Basal secretion
- 4.2 Stimulated secretion
- 5 Function
- 5.1 Role in oral tolerance
- 6 See also
- 7 References
- 8 Additional images
- 9 External links
Etymology
The term goblet refers to these cells' goblet-like shape. The apical portion is shaped like a cup, as it is distended by abundant mucinogen granules; its basal portion is shaped like a stem, as it is narrow for lack of these granules.
There are other cells that secrete mucus (as in the foveolar cells of the stomach[1]), but they are not usually called "goblet cells" because they do not have this distinctive shape.
Locations
They are found scattered among the epithelial lining of organs, such as the intestinal and respiratory tracts.[2] They are found inside the trachea, bronchus, and larger bronchioles in respiratory tract, small intestines, the colon, and conjunctiva in the upper eyelid.(Goblet cells are the chief source of tear mucus. These occur throughout the conjunctiva, especially the plica semilunaris. These are most dense in nasal conjunctiva, least dense in upper temporal fornix and absent in palpebral mucocutaneous junction and limbus.)
They may be an indication of metaplasia, such as in Barrett's esophagus.
Histology
In mucicarmine stains, deep red mucin found within goblet cell bodies.
The nuclei of goblet cells tend to be displaced toward the basal end of the cell body, leading to intense basophilic staining.
Types of secretion
Basal secretion
This is the normal base level secretion of mucus, which is accomplished by cytoskeletal movement of secretory granules.
Stimulated secretion
Secretion may be stimulated by dust, smoke, etc.
Other stimuli include viruses, bacteria, etc.
Function
Their main function is to secrete mucus in order to protect the mucosae where they are found. They also have a role in immunological oral tolerance.
Role in oral tolerance
Oral tolerance is the process by which the immune system is prevented from responding to antigen derived from food products, as peptides from food may pass into the bloodstream via the gut, which would in theory lead to an immune response. A recent paper published in Nature, has shed some light on the process and implicated goblet cells as having a role in the process.[3] It was known that CD103 expressing dendritic cells of the lamina propria had a role to play in the induction of oral tolerance (potentially by inducing the differentiation of regulatory T cells), and this paper suggests that the goblet cells act to preferentially deliver antigen to these CD103+ dendritic cells.[3]
See also
- Goblet cell carcinoid - a tumor that has a component that is similar to goblet cells
References
- ^ Histology image:11303loa from Vaughan, Deborah (2002). A Learning System in Histology: CD-ROM and Guide. Oxford University Press. ISBN 978-0195151732. - Digestive System: Alimentary Canal: fundic stomach, gastric glands, lumen"
- ^ "goblet cell" at Dorland's Medical Dictionary
- ^ a b McDole et al. (2012). "Goblet cells deliver luminal antigen to CD103+ dendritic cells in the small intestine". Nature 483 (7389): 345–349. doi:10.1038/nature10863. PMC 3313460. PMID 22422267.
Additional images
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An intestinal gland from the human intestine.
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section of mouse intestine. Mucus of goblet cells in blue.
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Section of mucous membrane of human stomach, near the cardiac orifice. X 45.
c. Cardiac glands.
d. Their ducts.
cr. Gland similar to the intestinal glands, with goblet cells.
mm. Mucous membrane.
m. Muscularis mucosae.
m’. Muscular tissue within the mucous membrane.
External links
- Histology at KUMC epithel-epith08 "Slide 8: Trachea"
- Goblet+cell at eMedicine Dictionary
- Goblet Cells at cvmbs.colostate.edu
- Diagram at uwlax.edu
Digestive system, physiology: gastrointestinal physiology
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GI tract |
Upper GI |
Exocrine |
- Chief cells
- Parietal cells
- Gastric acid
- Intrinsic factor
- Goblet cells
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Processes |
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Fluids |
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Lower GI |
Enteric nervous system |
- Meissner's plexus
- Auerbach's plexus
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Endocrine/paracrine |
- G cells
- D cells
- ECL cells
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enterogastrone: |
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- Enteroendocrine cells
- Enterochromaffin cell
- APUD cell
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Fluids |
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Processes |
- Segmentation contractions
- Migrating motor complex
- Borborygmus
- Defecation
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Either/both |
Processes |
- Peristalsis (Interstitial cell of Cajal
- Basal electrical rhythm)
- Gastrocolic reflex
- Digestion
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Accessory |
Fluids |
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Processes |
- Enterohepatic circulation
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Abdominopelvic |
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anat (t, g, p)/phys/devp/enzy
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noco/cong/tumr, sysi/epon
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proc, drug (A2A/2B/3/4/5/6/7/14/16), blte
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Anatomy of torso, digestive system: Gastrointestinal tract, excluding mouth (TA A05.3–7, TH H3.04.02-04, GA 11.1141)
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Upper GI |
Hypo-pharynx
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- spaces:
- Peripharyngeal space
- Retropharyngeal space
- Parapharyngeal space
- Retrovisceral space
- Retropharyngeal space
- Danger space
- Prevertebral space
- Pterygomandibular raphe
- Pharyngeal raphe
- Buccopharyngeal fascia
- Pharyngobasilar fascia
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Esophagus
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- UES
- LES
- Esophageal glands
- Serosa / Adventitia
- Muscular layer
- Submucosa
- Mucosa
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Stomach
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- by region:
- Greater curvature
- Lesser curvature
- Cardia
- Body
- Fundus
- Pylorus
- by layer:
- Serosa
- Muscular layer
- Submucosa
- Gastric mucosa
- Muscularis mucosa
- Gastric rugae
- Gastric pits
- Gastric gland
- Cardiac glands
- Fundic glands
- Pyloric glands
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Lower GI |
Intestine: small
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Layers
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- Serosa
- Subserosa
- Muscular layer
- Circular folds
- Submucosa
- Mucosa
- Muscularis mucosa
- Peyer's patches
- Intestinal villus
- Intestinal gland
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Duodenum
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- Suspensory muscle
- Major duodenal papilla
- Minor duodenal papilla
- Duodenal cap
- Duodenojejunal flexure
- Brunner's glands
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Jejunum
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Ileum
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- Terminal ileum
- Ileocecal valve
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Intestine: large
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Layers
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- Serosa
- Subserosa
- Muscular layer
- Submucosa
- Mucosa
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Cecum
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Colon
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- ascending colon
- hepatic flexure
- transverse colon
- splenic flexure
- descending colon
- sigmoid colon
- continuous
- taenia coli
- haustra
- epiploic appendix
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Rectum
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- Transverse folds of rectum
- Rectal ampulla
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Anal canal
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- Anal columns
- Anal valves
- Anal sinuses
- Pectinate line
- Sphincter ani internus muscle
- Intersphincteric groove
- Sphincter ani externus muscle
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anat (t, g, p)/phys/devp/enzy
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noco/cong/tumr, sysi/epon
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proc, drug (A2A/2B/3/4/5/6/7/14/16), blte
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Anatomy: Lower RT respiratory system (TA A06.3–5, TH H3.05.02, GA 11.1084)
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TB tree |
Trachea
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- Tracheal rings
- Annular ligaments of trachea
- Carina
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Bronchus
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- main bronchus
- lobar/secondary bronchi
- segmental/tertiary bronchi
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Lungs |
General
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- Left lung/Right lung
- Base/Apex
- Root/Hilum
- Superior lobe
- Lingula of left lung/Middle lobe of right lung
- Inferior lobe
- borders: Anterior border
- Posterior border
- Inferior border
- surfaces: Costal surface
- Mediastinal surface
- Diaphragmatic surface
- fissures: Oblique fissure
- Horizontal fissure
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BP segment
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- Bronchiole: Conducting zone (Terminal bronchiole)
- Respiratory zone (Respiratory bronchiole
- Alveolar duct
- Alveolus
- Blood-air barrier)
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Cells
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- Pneumocyte (Type I pneumocyte
- Type II pneumocyte)
- Clara cell
- Goblet cell
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anat (n, x, l, c)/phys/devp
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noco (c, p)/cong/tumr, sysi/epon, injr
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proc, drug (R1/2/3/5/6/7)
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Human cell types / list derived primarily from endoderm
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Foregut |
Respiratory |
- Pneumocyte
- Type I pneumocyte
- Type II pneumocyte
- Clara cell
- Goblet cell
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Digestive |
Stomach |
enteroendocrine: |
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exocrine: |
- Gastric chief cell
- Parietal cell
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Intestine |
enteroendocrine: |
- K cell
- S cell
- D cell
- I cell
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- Goblet cell
- Paneth cell
- Enterocyte
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Liver |
- Hepatocyte
- Hepatic stellate cell
- (Kupffer cell from mesoderm)
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Gallbladder |
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Exocrine pancreas |
- Centroacinar cell
- Pancreatic stellate cell
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Endocrine |
endocrine pancreas |
- alpha cell
- beta cell
- delta cell
- F cell(PP cell
- epsilon cell
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Pharyngeal pouch |
Endocrine |
- thyroid
- parathyroid
- Parathyroid chief cell
- Oxyphil cell
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Hindgut/cloaca |
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