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Research draft

epithelium

vr.tr.epithelium · PHY.LIV

Let an agent explain epithelial tissue and its classification and functions, describe where different epithelia occur and how they are studied, relate epithelium to disease in general terms, and support learning in histology.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain epithelial tissue and its classification and functions, describe where different epithelia occur and how they are studied, relate epithelium to disease in general terms, and support learning in histology.

One of the basic tissue types of animals, consisting of closely packed cells arranged in sheets that line body surfaces, cavities and ducts and form glands, classified by cell shape as squamous, cuboidal or columnar, by layering as simple, stratified or pseudostratified, and by specialisation such as ciliated respiratory epithelium, transitional epithelium of the urinary tract and neuroepithelium; epithelia provide barriers, absorption, secretion and sensation, and are the origin of most cancers as carcinomas.

What it is for: Sheet-forming tissue lining surfaces and glands.

It can be explain classification and functions; describe locations; relate to disease generally; support histology learning.

Distinguishing features

Cell polarity

Basement membrane

Shape and layering classes

Barrier and secretory roles

What it looks like

Sheets of tightly packed cells on a basement membrane, seen under the microscope.

How it is recognised

Closely packed cells in sheets

Lines surfaces and forms glands

Connective tissue has scattered cells in matrix; endothelium lines vessels

Related models

is a kind of - category

tissue

is a kind of - category

particular anatomical entity

is related to - benign tumours of glandular epithelium

adenoma

is related to - carcinomas arise from epithelium

liver cancer

In practice

Families and kinds

simple squamous, cuboidal and columnar epithelia

stratified epithelia including skin

pseudostratified ciliated epithelium

transitional epithelium

glandular and neuroepithelium

Standards and regulation

Histological nomenclature standards

Laboratory tissue handling rules

Pathology reporting standards

Failure modes and hazards

Confusing epithelium with endothelium and mesothelium

Agents giving diagnostic advice

Oversimplifying classification

Also called

ciliated epitheliumlip epitheliumrespiratory epitheliumtransitional epitheliumneuroepitheliumsquamous epithelial cellsquamous epitheliumcuboidal epitheliumcolumnar epitheliumsimple epitheliumpseudostratified columnar epitheliumgerminal epitheliumatypical epitheliumecto-epitheliumendo-epitheliummeso-epitheliumstratified epitheliumhuman airway epitheliumlower respiratory tract epitheliumurotheliumhuman SARS-CoV-2-RNA-positive squamous epithelial celluterine cervix squamous celloral mucosa squamous celltonsil squamous cellstratified squamous epithelial cellsquamous endothelial cellpseudostratified ciliated columnar epitheliumpseudostratified smooth columnar epitheliummixed stratified cuboidal and columnar epithelium

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Also registered as vr.tr.epithelium

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What epithelium is.

Histology.

Classes

Classification.

Classes

Classes.

  1. How are epithelia classified by cell shape, layering and specialisation, and how are they recognised under the microscope? definition
  2. Which entry fits a specific epithelium? action

Functions

Functions.

Functions

Functions.

  1. How do epithelia provide barriers, absorption, secretion, transport and sensation? definition
  2. Which entry fits a specific organ? action
Locate Where epithelia occur.

Anatomy.

Surfaces

Surfaces and linings.

Surfaces

Surfaces.

  1. Which epithelia line skin, airways, gut, urinary tract and other surfaces, and why? provenance
  2. Which entry fits anatomy of a region? action

Glands

Glandular epithelium.

Glands

Glands.

  1. How do glands form from epithelium, and how do exocrine and endocrine glands differ? definition
  2. Which entry fits glands? action
Disease Epithelium and disease.

General information.

Pathology

Pathology.

Pathology

Pathology.

  1. How do epithelial changes such as metaplasia, dysplasia and carcinoma arise, in general terms? provenance
  2. Is the user asking about their own diagnosis, which needs a clinician? boundary

Repair

Renewal and repair.

Repair

Repair.

  1. How do epithelia renew and repair, and what role do stem cells play? provenance
  2. Which entry fits wound healing? action
Learn Study and teaching.

Education.

Methods

Study methods.

Methods

Methods.

  1. How are epithelia prepared, stained and imaged in histology? provenance
  2. Which references are standard? provenance

Teach

Teaching.

Teach

Teaching.

  1. How can epithelial tissue be taught with slides and diagrams? action
  2. Which misconceptions arise? provenance

What the second pass must settle

  • Should each epithelium type be a separate entry?
  • How should histology atlases be linked?
  • How should pathology be linked?
Draft as JSON