Epithelial tissue Flashcards by Dianna Cuyao

Q

Lines the internal and covers the external surfaces of the body.

A

Epithelial tissue

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Q

Protects the body from abrasion and injury.

A

Epithelial tissue

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Q

Absorption of material from a lumen.

A

Epithelial tissue

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Q

Transportation of material along a surface.

A

Epithelial tissue

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Q

All epithelial tissue lie at the?

A

basement membrane

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Q

All epithelial tissues are what?

A

Avascular

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Q

All epithelial cells undergo?

A

metaplasia

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Q

5 types of Junctional Complexes

A

Occluding or Tight Junctions
Adherent Junction
Desmosome or macula adherens
Hemidesmosomes
Gap or communicating Junctions

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Q

Allows movement of materials along the surface.

A

Cilia

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Q

The cells of epithelial tissue have three (3) types of surfaces.

A

basal
apical
lateral

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Q

2 major characteristics of epithelial tissue divide it into subclasses:

A

the shape of the cells
presence of the layers

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Q

3 Shape of Cells of Epithelial Tissue

A

Squamous
Cuboidal
Columnar

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Q

2 layers of Epithelial Tissue

A

Simple
Stratified

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Q

Distends tissues of urinary tract stretching.

(specialized epithelial tissue)

A

Transitional Epithelium

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Q

Makes up the epidermis of skin keratin.

(specialized epithelial tissue)

A

Keratinized Stratified Squamous Epithelium

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Q

Found in regions subject to abrasion, for example oral mucosa and vaginal lining control small amount of keratin.

(specialized epithelial tissue)

A

Non - Keratinized Stratified Squamous Epithelium

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Q

Lines the inner surface of the trachea not all cell reached apical level single basil/amina.

(specialized epithelial tissue)

A

Pseudostratified Ciliated Columnar Epithelium

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Q

Lines the inner surface of blood vessels simple squamous.

(specialized epithelial tissue)

A

Endothelium

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Q

Present in the nervous system Central Nervous System; cuboidal or columnar.

(specialized epithelial tissue)

A

Ependymal Cells

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Q

8 types of Epithelium

A

Simple Squamous
Simple Cuboidal
Simple Columnar
Stratified Squamous
Stratified Cuboidal
Stratified Columnar
Transitional
Pseudostratified Columnar

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Q

Lining of Loop of Henle, Alveoli, Blood
vessels.

(types of epithelium)

A

Simple Squamous

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Q

Ducts of the gland, Lining of kidney
tubules.

(types of epithelium)

A

Simple Cuboidal

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Q

Uterine tube, Lining of stomach, gall bladder (non-ciliated), Fallopian tube (ciliated), small intestine (w/ microvilli).

(types of epithelium)

A

Simple Columnar

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Q

Non-Keratinized: Vagina, Cervix, Mouth,
Esophagus / Keratinized: Skin

(types of epithelium)

A

Stratified squamous

Ducts of sweat glands. (types of epithelium)

Stratified Cuboidal

Male Urethra (types of epithelium)

Stratified Columnar

Urinary bladder, urinary tract (types of epithelium)

Transitional

Trachea (ciliated) (types of epithelium)

Pseudostratified Columnar

It creates protective boundaries and is involved in the diffusion of ions and molecules.

Epithelial tissue

It is a highly cellular tissue that overlies body surfaces, lines cavities, and forms glands.

Epithelial tissue

Are numerous, exist in close apposition to each other.

Epithelial cells

Cells are flattened, can be keratinized or nonkeratinized, involved in protection and diffusion, found in capillary walls and skin.

Squamous

Cells are cube shaped, can be found forming tubes in the nephrons of the kidney involved in secretion and absorption.

Cuboidal

Cells are rectangular, cilia are often present, involved in absorption, secretion, protection, and lubrication, form the inner lining of the gut tube

Columnar

The thinness of these cells facilitates the transfer of materials across the epithelium. — Human Alveoli [types of epithelium]

Simple Squamous

This epithelium is often associated with absorption, secretion, or excretion of waste matter. — Kidney tubules [types of epithelium]

Simple Cuboidal

This epithelium is often associated with absorption or secretion. — Small intestines [types of epithelium]

Simple Columnar

It has multiple layers of cells becoming flattened as they move from the basal layer to the apical layers. It provides protection from abrasion and is keratinized on the external surface of the body. [types of epithelium]

Stratified Squamous

Limited distribution - found in the lining of larger ducts. — Salivary gland [types of epithelium]

Stratified Cuboidal

It is adapted for extensibility and is restricted to the urinary tract. It has multiple layers of cells with an outermost layer of much larger, dome-shaped cells (umbrella cells) that change shape during contraction and distention. — Urinary bladder [types of epithelium]

Transitional

It appears to be stratified because the nuclei of the epithelial cells are at different levels. However, every cell is in contact with the basement membrane, but not all cells reach the lumen. — Trachea [types of epithelium]

Pseudostratified Columnar

Faces the lumen or the external environment. [epithelial surfaces]

Apical surface

Faces the sides of adjacent cells. [epithelial surfaces]

Lateral surface

Attaches to the basement membrane. [epithelial surfaces]

Basal surface

These are formed by the down growth of an epithelium into the underlying connective tissue.

Glands

It separates an epithelium from the underlying connective tissue.

Basement membrane

Skin protects from sunlight & bacteria & physical damage. [function]

Protection

Lining of small intestine, absorbing nutrients into blood. [function]

Absorption

Lining of Kidney tubules filtering wastes from blood plasma. [function]

Filtration

Different glands produce perspiration, oil, digestive enzymes and mucus. [function]

Secretion

4 Functions of Epithelial tissue

1. Protection 2. Absorption 3. Filtration 4. Secretion

Present in sites of Exchange as Nephrons & Lungs. [types of epithelium]

Simple squamous

Protects the body from abrasion and injury. [organ]

Skin Esophagus

Absorption of material from a lumen. [organ]

Tubules in kidney Small and Large Intestines

Transportation of material along a surface. [organ]

Cilia-mediated transport in trachea

Secretion of mucus, hormones, and proteins. [organ]

Glands

Gas exhange [organ]

Alveoli in lung

Lubrication between two surfaces. [organ]

Mesothelium of pleural cavity