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Epithelial Tissue
Lecture 4a
36
Anatomy
Not Applicable
04/22/2013

Additional Anatomy Flashcards

 


 

Cards

Term
4 types of tissue
Definition

Epithlial

Connective

Muscle

Nerve

Term
What 2 tissues are surface tissues?
Definition

Epithelial

Connective

Term
What is an Epithelium?
Definition

Lines cavities and tubules

Lines external and internal body surfaces

Term
Glands
Definition
Structures that produce secretions
Term
5 characteristics of Epithelia
Definition

Cellularity

Polarity

Attachment

Avascularity

Regeneration

Term
Cellularity
Definition
Composed of cells bound by cell junctions
Term
Polarity
Definition
Apical and Basal surfaces
Term
Attachment
Definition

Via basal lamina to underlying connective tissue

(all epithelia have a basal lamina)

Term
Avascularity
Definition

No blood vessels 

(Rely on nearby tissues for blood)

Term
Regeneration
Definition

Germinative cell division 

(recreate themselves)

Term
5 Epithelial Tissue Functions
Definition

Protection

Control permeability

Move fluids over the surface

Sensation

Produce specialized secretions (glandular epithelium)

Term
Microvilli
Definition
Increase absorption or secretion
Term
Cilia
Definition

Move fluids

Usually in a tube

Term
Tight Junctions
Definition

Surrounds whole cell

Waterproof

Isolates waste in lumen

Term
Gap Junctions
Definition

Allow rapid communication

(just holes that allow things to go through)

Term
Desmosomes
Definition

Tie cells together with great strength

Anchored to cytoskeleton

Don't go all the way around cells

Term
Hemidesmosomes
Definition
Attach basal membrane to basal lamina
Term
Desmosomes
Definition

Sticky stuff that the cell secretes to (intercellular cement)

2 adjacent cells attach to it

Term
To classify shape for stratified epithelium
Definition
Observe TOP layer to determine shape
Term
Mesothelium lines
Definition

Body cavities found in serous membranes

e.g. peritoneum, pleura

Term
Endothelium lines
Definition

Heart

Blood vessels

 

(so capillaries are endothelium)

Term
Simple Squamous Epithelium
Function & Location
Definition
Diffusion and filtration where
protection is not important
Absorption and Secretion

Air sacs of lungs
Term
Simple Cuboidal Epithelium
Function & Location
Definition
Absorption and Secretion
Kidney Tubules (dump fluid contents in blood)

(if nucleus is perfectly spherical, it's cuboidal)
Term
Simple Columnar Epithelium
Function & Location
Definition
Absorption and Secretion
Digestive Tract
(goblet cells are common)
Term
Ciliated Pseudostratified Columnar Epithelium
Definition
Secretion
Trachea

(all cells touch basal lamina)

(all touch basal lamina but some don't reach free surface)
Term
Transitional Epithelia
Function & Location
Definition
Expansion and recoil after stretching
Urinary bladder
Term
Stratified Squamous Epithelium
Function & Location
Definition
Protection
Keratinized: dry - forms external part of skins epidermis
Nonkeratinized: wet - linings of mouth
Term
Stratified Cuboidal Epithelium
Function & Location
Definition
Secretion & Absorption
Sweat gland duct

(only top layer is cuboidal)
Term
Stratified Columnar Epithelium
Function & Location
Definition
Protection
Urethra

(only top layer must be columnar, near lumen)
Term
Glandular Epithelium
Function & Location
Definition
one or more cells that makes and secretes an aqueous fluid
Mammary Gland
Term
Endocrine Glands
Function & Location
Definition
Ducts of glands that produce hormones
Secretion
Pancreas
Term
Exocrine Glands
Function & Location
Definition
Secrete products onto body surfaces
Sweat
(epithelial source)
Term
The only important unicellular gland
Definition
Goblet Cell
Term
Merocrine
Definition
Products secreted by exocytosis

(like sweat)
Term
Holocrine
Definition
Fills itself with product, then bursts

(like sebaceous glands)
Term
Apocrine
Definition
Products gather on top of cell then break down
Mammary gland
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