BIOL 223 Lecture Notes - Histology, Defence Mechanisms, Vigna
Document Summary
Histology - the study of tissue tissue - collection of cells with rimilar rtrvotuor & functions. 4 tissutyes: epithelial = skin/ covering lining, connective = support, muscle = movement, nervous. F- issue: tissue ftp. sv-woven) : group of cells that perform a common or related function . similar. in structure. " covers the body "s surface /lines a body cavity. Functions: protection - a barrier between internal cell r + the dirt/ microbes in the environment, absorption - absorbs the nutrients, filtration - filtering out dirt to clean air that is inhaled . Characteristics: cellularity - space between call, tight junctions - helps to make space for call, desmosomos , gap junction - communicate to one another to move around. Increase resistance of the tissue to mechanical tissue: polarity, apical surface - outward face ride . tinning of the organs, basal surface - the bottom vvr face, microvilli - curved membrane .
