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Chapter 4
Tissue: The Living Fabric
25
Anatomy
Undergraduate 1
08/29/2007

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Term
Tissues
Definition
Groups of cells similar in structure and perform a common or related function
Term
Organ
Definition
Many tissues combined
Term
Epithelial Tissue
Definition
Lines inner and outer body
Term
Connective Tissue
Definition
Supports
Term
Muscle Tissue
Definition
Allows Movement
Term
Nervous Tissues
Definition
Controls
Term
Histology
Definition
Study of tissues
Term
Epithelial Tissue
Definition
Lines the open cavity of cardivascular, digestive, and respiratory systems covers organs of closed cavity
Term
Epithelial Function
Definition
1. Protects
2. Absorption
3. Filtration
4. Excretion
5. Secretion
6. Sensory Reception
Term
6 Characteristics of epithelium
Definition
1. Polarity
2. Specialized contacts
3. Supported by connective tissue
4. Defines Boundary
5. Avascular but innervated
6. Regeneration
Term
Microvilli
Definition
Tiny hair like structures that increase surface area
Term
Reticular Lamina
Definition
Deep to basal lamina
Term
Basement Membrane
Definition
made up of Basal Lamina and Reticular Lamina
Term
Simple Epithelia
Definition
composed of a single cell layer (used in absorbtion and filtration areas)

All cells in the layer usually have same shape
Term
Stratified Epithelia
Definition
has two or more cell layers (used in high abrasion area where protection is needed)

Named for the shape of the cells in the apical layer
Term
Three types of cells
Definition
Squamous - looks like flattened egg

Cuboidal - looks like a cube - nuclei
in the center

Columnar - Tall tightly packed nuclei
located at the bottom
Term
Pseudostratified Columnar Epithelium
Definition
Vary in height
(false) - Pseudo
secretes or absorbs substances
ciliated
propels mucus away from lungs
Term
Endothelium
Definition
provides slick friction reducing lining
Term
Mesothelium
Definition
Found in serous membranes lining ventral body cavity and covering organs
Term
Transistional Stratified Epithelia
Definition
found in the bladder wall lining
become distended w/ urine
6 layers of cells go to 3 layers
cells flatten when stretched
Term
Simple Squamous Epithelia
Definition
Scale like
Provides little protection
located where filtration occurs
Term
Simple Cuboidal Epithelia
Definition
located in areas where secretion and absorption occur
Term
Simple Columnar Epithelia
Definition
Tall Tightly packed cells
Absorption and secretion
Lines from stomach to rectum
has dense microvilli
Term
Stratified Squamous
Definition
Protective
found in areas subject to wear and tear
several layers thick
Deeper cells are cuboidal or columnar
Term
Stratified Columnar
Definition
Lines some glandular ducts
Pharnyx , male urethra
found in transitional areas or junctions between other types of epithelia
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