ANATOMY 328 Lecture Notes - Lecture 28: Metaplasia, Parallel Transport, Urinary System
Document Summary
Much of our epithelial tissue is repeatedly exposed to harsh environments. For example, the epithelia lining our stomach has to deal with exposure to harsh chemicals while our skin is constantly exposed to abrasive forces. Protection (regeneration stomach replaces itself every 3-5 days), secretion. Draw a simple sketch of the different classifications of epithelial tissue: Consider the anatomy of the following types of epithelial tissue and discuss the following with your classmates: Single layer of flat cells: diffusion, absorption, thin, digestive tract, lungs. Single layer of tall, narrow cells with microvilli on the apical surface. It may contain goblet cells: absorption, microvilli are present (large sa, gi tract (intestines) Single layer of cells of differing heights: movement across surface of cell, cilia present, respiratory tract, transport sperm out of bod. Multiple layers of cells with cell size ranging from cuboidal/columnar to squamous: protection, many layers, skin. Other terms: neoplasia, necrosis, apoptosis, extracellular matrix.
