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Epithelial Tissue
Question | Answer |
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How to name epithelial tissue | When investigating epithelia, locate the apical and basal surfaces: - The cell type at the apical surface names the epithelium - The number of layers between the apical and basal surfaces names the epithelium |
Simple Squamous Function | allows materials to pass by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae |
Simple Squamous Location | Kidney glomeruli; air sacs of the lungs; lining of heart, blood vessels and lymphatic vessels; lining of ventral body cavity (serosae) |
simple cuboidal function | secretion and absorption |
Simple cuboidal location | Kidney tubules; ducts and secretory portions of small glands; ovary surface |
Simple Columnar function | absorption; secretion of mucus, enzymes, and other substances; ciliated type propels mucus (or reproductive cells) by ciliary action |
Simple Columnar Location | Nonciliated type lines most of the digestive tract (stomach to anal canal), gallbladder, and excretory ducts of some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus |
pseudostratified columnar function | secrete substances, particularly mucus; propulsion of mucus by ciliary action |
Pseudostratified columnar location | nonciliated type in male's sperm-carrying ducts and ducts of large glands; ciliated variety lines the trachea, most of the upper respiratory tract |
Stratified squamous function | protects underlying tissues in areas subjected to abrasion |
Stratified squamous location | nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina; keratinized variety forms the epidermis of the skin, a dry membrane |
Stratified cuboidal function | Protection |
Stratified cuboidal location | Largest ducts of sweat glands, mammary glands, and salivary glands |
transitional epithelium function | stretches readily, permits stored urine to distend urinary organ. |
transitional epithelium location | lines the ureters, bladder, and part of the urethra |
Stratified columnar function | protection |
Stratified Columnar locations | male urethra, pharynx, epiglottis, anus, mammary glands, salivary glands |