All Diagrams of epithelium from di fore's

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I now have all the key image URLs from the epithelium plates. Let me compile the complete response with all the diagrams found. Here is a comprehensive compilation of all epithelium diagrams from the histology textbooks in our library:

Note: Di Fiore's Atlas of Histology is not in the library's collection. The diagrams below are from Histology: A Text and Atlas with Correlated Cell and Molecular Biology (Ross & Pawlina, 8th ed.), which covers the same epithelium content in an equivalent atlas format with labeled photomicrographs.

Diagrams & Photomicrographs of Epithelium

Classification Summary (Table 5.1)

Type	Location	Function
Simple squamous	Endothelium, mesothelium, Bowman capsule, lung alveoli	Exchange, barrier, lubrication
Simple cuboidal	Kidney tubules, pancreatic ducts, liver cords, thyroid follicles	Absorption, secretion
Simple columnar	GI tract, gallbladder, uterine tubes	Absorption, secretion
Pseudostratified columnar	Trachea, bronchi, male reproductive tract	Mucociliary transport, absorption
Stratified squamous	Skin (keratinized), esophagus, vagina (non-keratinized)	Protection
Stratified cuboidal	Sweat gland ducts, esophageal glands	Secretion, conduction
Transitional (urothelium)	Urinary tract from calyces to urethra	Distensibility

PLATE 5.1 - Simple Squamous and Simple Cuboidal Epithelia

Simple cuboidal epithelium - Pancreatic ducts (H&E x700)

Simple cuboidal epithelium, pancreas, human, H&E ×700

Two pancreatic ducts (PD) lined by simple cuboidal epithelium. Nuclei (N) are spherical. Free surface faces the lumen; basal surface rests on connective tissue (CT). Terminal bars (TB) visible between adjacent cells.

Simple cuboidal epithelium - Lung bronchioles (H&E x175)

Simple cuboidal epithelium, lung bronchiole, H&E ×175

Cuboidal cells (cc) lining the smallest conducting bronchioles. Spherical nuclei. Airway lumen (A) faces the free surface.

Simple cuboidal epithelium - Liver hepatocytes (H&E x450)

Simple cuboidal epithelium, liver, H&E ×450

Cords of hepatocytes (H) as simple cuboidal cells. Blood sinusoids (S) between cords. Inset shows bile canaliculus (C) where grooves of adjacent cells meet - the secretory free surface of liver cells.

PLATE 5.2 - Simple and Stratified Epithelia

Simple epithelium types - Exocrine pancreas (H&E x450)

Simple epithelium, exocrine pancreas, monkey, H&E ×450

Three epithelium types in one field: simple columnar (acinar cells, circle), simple squamous (small duct, arrows), and simple cuboidal (large cross-sectioned duct, asterisk).

Simple cuboidal epithelium - Kidney tubules (H&E x450)

Cross-sectioned kidney tubules (arrows). Cell width approximates cell height - the defining feature of cuboidal cells.

Simple columnar epithelium - Colon (H&E x350)

Single layer of tall absorptive cells plus mucus-secreting goblet cells (arrows, light-staining "goblet"). Nuclei basally located. Intestinal glands (GL) extend into connective tissue (CT).

Multiple simple epithelium types - Summary plate (H&E)

Six microscopic images of simple epithelia with labeled structures

Comparative plate of various simple epithelium forms with labeled arrows and annotations.

PLATE 5.3 - Stratified Epithelia and Epithelioid Tissues

Stratified squamous and stratified cuboidal - Esophagus (H&E x250)

Stratified epithelia, esophagus, monkey, H&E ×250

Left: stratified squamous epithelium (SS) lining esophagus. Right: duct of esophageal gland showing stratified cuboidal epithelium (StCu) - two cell layers, cuboidal surface cells.

Stratified cuboidal epithelium - Sweat gland duct in skin (H&E x450)

Sweat gland duct (stratified cuboidal, StCu) entering the stratified squamous epidermis (SS). Two cell layers with roughly square inner (surface) cells.

Epithelial transition - Anorectal junction (H&E x300)

Epithelial transition, anorectal junction, H&E ×300

Abrupt transition (arrowhead) from simple columnar (SCol) colon epithelium on the left to stratified cuboidal (StCu) at the anal canal.

Transitional epithelium (urothelium) - Urinary bladder (H&E x400)

Transitional epithelium, urinary bladder, monkey, H&E ×400

Non-distended bladder: 4-5 cell layers. Surface cells are large and dome shaped (asterisks). Pear-shaped cells in middle. Smallest cells deepest. Underlying connective tissue (CT) with fibroblasts.

Epithelioid tissue - Testicular Leydig cells (H&E x350)

Epithelioid tissues, testis, monkey, H&E ×350

Interstitial (Leydig) cells (IC) - epithelioid arrangement without a free surface. Rich capillary network (C) and lymphatic channels surround them.

Epithelioid tissue - Islets of Langerhans in pancreas (H&E x450)

Epithelioid tissues, endocrine pancreas, H&E ×450

Endocrine islet cells (En) in epithelioid arrangement - no free surface. Contrast with surrounding exocrine acini (Ex) which do have a free lumen. Prominent capillaries (C).

Summary plate - All stratified epithelia (H&E)

Six microscopic images of stratified epithelia types

Comparative plate of stratified epithelium types with labeled arrows and annotations.

Key Classification Points

Simple = one layer; Stratified = two or more layers (named by surface cell shape)
Pseudostratified = appears multilayered but all cells touch the basement membrane (a type of simple epithelium)
Transitional/Urothelium = special stratified type that distends; dome-shaped surface cells ("umbrella cells") when contracted
Epithelioid = cells that resemble epithelium structurally but lack a free surface (e.g., Leydig cells, islet cells)

Source: Histology: A Text and Atlas with Correlated Cell and Molecular Biology, Ross & Pawlina, 8th ed.

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