KINESIOL 1A03 Lecture Notes - Transitional Epithelium, Histology, Microvillus
Document Summary
Chapter 4 - histology: the study of tissues lecture. Histology: tissue fixed to slide can be examined. Tissue classification based on structure of cells, composition of noncellular (extracellular matrix), and cell function. Ectoderm: inner layer forms lining of digestive tract and derivitives (evaginations of digestive tract) middle layer forms tissue as such muscle, bone, blood vessels urinary system outer layer forms skin and neuroectoderm. Extracellular: formed by secretions of both epithelium + connective tissue. Simple: one layer of cells the tissue - shape of cells may be diff close to basement membrane as opposed to free/apical layer. Stratified: more than one layer. shape of cells of apical layer (free layer) used to name membrane so it is in fact simple. Psuedostratified: tissue appears to be stratified, but all cells contact basement. Simple: allows diffusion of gases, filtration of blood, secretion, absorption. Cubodial and columnar: secretion or absorption, may include goblet cells that produce and secrete mucus.