Ch 4 The Tissue Level Of Organization Flashcards
Groups of cells that are similar to each other in the structure and function
Tissues
Fluid material between the cells of a tissue
Matrix aka Extracellular Matrix
Thin watery (mostly blood plasma) with no fibers
Extracellular Matrix
Gives tissue flexible strength
Collagen
Gives tissue the ability to stretch and rebound
Elastin
This structure is the contact point between the cell membrane of tissue cells
Cell junction
Junction that fuses membranes together
Tight junction
The junction that circles around cells like a belt
Adhering junctions
The junction that creates stability between cells so they do not separate
Desmosomes
The junction that anchors cells to basement membrane and not other cells
Hemidesmosomes
The junction that is not actually connecting but allow for muscles and nerve impulses to spread as a big unit
Gap junction
Tissue that covers and lines the body’s cavity
Epithelial Tissue
what is Epithelial Tissue primary function?
- Protection
- Absorption
- Filtration
- Secretion
what tissue is avascular
Epithelial Tissue
cells that are flat and scalelike
squamous
cells are as tall as they are wide like a cube
cuboidal
cells are taller than they are wide (like a column)
Columnar
single layer of cells of the same shape are classified as?
Simple
Classified by many layers of cells; named for the shape of the cells in the outer layer
Stratified
which layer is the most important & it is used for being named
The top layer
Characteristics of simple squamous
- thing layer of flat cells
- Thinnest of all epithelium
what is the function of simple squamous
- gas exchange in lungs
- Blood filtration in kidneys
what is the characteristics of simple cuboidal
- Cubed
- Single layer
where is simple cuboidal found
- glands
- kidney tubules
what is the function of simple cuboidal
*think of buckets
- absorbs water and electrolytes
- Secrete enzymes and hormones
Characteristics of simple columnar epithelium
- single layer of column shaped cells
Where is Simple Columnar epithelium found
The lining of the digestive tract
what is the function of Simple Columnar epithelium
- Protection
- Absorption
- Secretion
what is the characteristics of Psuedostratified Columnar Epithelium
Single layer of column Shaped Cells but appear to have multiple layers
where is psuedostratified Columnar epithelium found
Found in large ducts of glands and male urethra
what is the function of pseudostratified columnar epithelium
- Absorption
- Secretion
Characteristics of Stratified squamous epithelium
- Several Layers under a single layer of flat squamous
where is the location of Stratified Squamous Epithelium
Superficial layer of the skin
what is the function of Stratified Squamous Epithelium
Protection from sunlight and bacteria
Characteristics of Stratified Columnar Epithelium
- Single layer of columnar cells that appear multi-layered
Characteristics of Stratified Columnar Epithelium
- Single layer of columnar that appears multilayered