Chapter 5 (part 1) Epithelial Tissues Flashcards
Tissues
A group of cells with the same size, shape, and functions working together
Histology
The study of tissues
Connective Tissue
Supports, protects, binds together tissues and organs of the body, fills in spaces, stores fat, and produces blood cells
Muscle Tissue
Contracts and moves various parts of the body
Nerve Tissue
Carry out messages through electrical impulses to control and coordinates body functions
Epithelial Tissue
Form protective coverings on body surfaces and function in secretion and absorption
Epithelial Tissues are composed of
Tightly packed cells that provide effective protective coverings for the body
Epithelial Tissues generally lack
Blood supplies (avascular), but nutrients, oxygen, etc can easily diffuse through the cells
Epithelial Tissues heal rapidly when injured because
They are constantly producing new cells through mitosis
Epithelial Tissues are anchored to
Connective tissues below by a basement membrane (nonliving protein “hooks”)
Epithelial Tissues are classified by their
Shape and numbers of layers
Simple Epithelial Tissues have (how many layers)
One layer of cells
Stratified Epithelial Tissues have
(layers)
2 or more layers of cells
Pseudostratified Epithelial Tissues have
layers
A single layer of cells that appear to be more than one layer ( the cells are scattered)
Squam means
Scale-like
Squamous Epithelial Tissue Shape
Thin, flattened, irregularly shaped
Cuboidal Epithelial Tissue Shape
Cube shaped
Columnar Epithelial Tissue Shape
Elongated with the nucleus near the bottom of the cell and often have cilia on top
Glandular Epithelial Tissue Shape
Columnar or cuboid cells that form a “flask” structure that opens into duct and forms a gland
Transitional Epithelial Tissue Shape
Cuboid shaped cells that transition to elongated “stretched” cells
Simple Squmous Epithelial Location
Air sacs of lungs (aleoli), composes wall of capillaries (tiny blood vessels), linings of larger blood and lymph vessels, form the serous membranes of our body cavities
Simple Squmous Epithelial Function
Filtration, diffusion, osmosis, protective covering of surfaces
Stratified Squmous Epithelial Structure
Many layers of thin, flattened irregularly shaped cells
Younger Stratified Squmous Epithelial Structure
Cells are cuboid shaped and then flatten as they move closer to the surface
Stratified Squmous Epithelial Location
Composes the outer layer of skin, esophagus, throat, vagina, and anal canal
Stratified Squmous Epithelial Function
Protective covering of surfaces
Simple Cuboidal Epithelial Structure
Single layer of cubed shaped cells
Simple Cuboidal Epithelial Location
Lining the surface of ovaries, lining kidney tubes, lining ducts of certain glands such as the slivary glands
Simple Cuboidal Epithelial Function
Absorption and secretion
Stratified Cuboidal Epithelial Structure
Many layers of cubed shaped cells
Stratified Cuboidal Epithelial Location
Lining thee ducts of mammary glands, sweat glands, salivary glands and the pancreas
Stratified Cuboidal Epithelial Function
Protective covering of surface
Simple Columnar Epithelial Structure
Single layer of elongated cells
Simple Columnar Epithelial Location
Lining of the uterus, stomach, and intestines
Simple Columnar Epithelial Function
Absorption, secretion, and protective, covering of surfaces
Stratified Columnar Epithelial Structure
Many layers of elongated cells
Stratified Columnar Epithelial Location
Lining of vas deferens and male urethra, parts of the pharynx (throat)
Stratified Columnar Epithelial Function
Secretion and protective covering of surfaces
Pseudostratified Columnar Epithelial Structure
Many layers of elongated cells with cilia and gobelt cells that make mucous
Pseudostratified Columnar Epithelial Location
Lining all respiratory passages (nose, throat, trachea)
Pseudostratified Columnar Epithelial Function
Protective covering of surfaces, movement and secretion of mucous
Transitional Epithelial Structure
Many layers that are a cube, shaped and are able to distend, or elongate
Transitional Epithelial Location
Lining of urinary bladder, ureters, and part of the urethra
Transitional Epithelial Function
Distensibility (stretch and return) and protective covering of surfaces
Glandular Epithelial Structure
Columnar or cuboid cells that form a “flask” structure that open into ducts and form a gland
Glandular Epithelial Location (Exocrine)
Secrete outside the body such as salivary glands, sweat glands, mammary glands
Glandular Epithelial Location (Endocrine)
Secrete hormones inside the body includes all endocrine system glands
Glandular Epithelial Function
Secretion
