Types of Tissues and Epithelial Tissues Flashcards
-Brain
-Spinal cord
-Nerves
Nervous tissue: Internal communication
-Muscles attached to bones (skeletal)
-Muscles of heart (cardiac)
Muscles of walls of hollow organs (smooth)
Muscle tissue: Contacts to cause movement
-Lining of digestive tract organs and other hollow organs
-Skin surface (epidermis)
Epithelial tissue: Forms boundaries between different environments, protects, secretes, absorbs, filters
-Bones
-Tendons
-Fat and other soft padding tissue
Connective tissue: Supports, protects, binds other tissues together
Types of epithelia
Simple epithelia and stratified epithelia
One layer of cells all in direct contact with basement membrane
Simple epithelium
Two or more layer of cells; only deepest cell layer in direct contact with basement membrane
Stratified epithelium
One layer of flattened cells
Simple squamous
One layer of cells about as tall as wide
Simple cuboidal
One layer of tall, narrow cells
Simple columnar
One layer of tall cells that appears stratified
Pseudostratified columnar
Multiple layers; upper layers of flattened cells
Stratified squamous
Two or more layers; cells about as tall as wide
Stratified cuboidal
Two or more layers of tall, narrow cells
Stratified columnar
Multiple layers of cells that change shape when stretched
Transitional
Superficial cells are dead
Keratinized (type of stratified squamous)
Superficial cells are living
Nonkeratinized (type of stratified squamous)
Functions of Epithelial Tissue
-Provide physical protection
-Control permeability
-Provide sensation
-Produce specialized secretions
Vasoconstriction
Happens when contracting blood vessel, high blood pressure
Vasodilation
Happens when blood vessel relaxes, lowers blood pressure
-Lines blood vessels and air sacs of lungs
-Permits exchange of nutrients, wastes, and gases
Simple squamous
-Lines kidney tubules and glands
-Secretes and reabsorbs water and small molecules
Simple cuboidal
-Lines most digestive organs
-Absorbs nutrients, produces mucus
Simple columnar
-Outer layer of skin, mouth, vagina
-Protects against abrasion, drying out, infection
Stratified squamous
-Lines ducts of sweat glands
-Secretes water and ions
Stratified cuboidal
-Lines epididymus, mammary glands, larynx
-Secretes mucus
Stratified columnar
