BIOA11H3 Lecture Notes - Lecture 4: Skeletal Muscle, Hepatitis C Virus, Nervous Tissue
Document Summary
Tissues: groups of similar cell types that perform a common function: four basic types of tissue in the human body, epithelial, connective, muscle, nervous. Epithelial tissue (epithelium): tightly packed sheets of cells that cover organs and outer surfaces, as well as line hollow organs, vessels, and body cavities: anchored on one face, but free on another. ~ free side exposed to body uids or the external environment: can be single layer or many layers thick, lines many organs; ~ i. e. , heart & blood vessels, respiratory tract, digestive tract, urogenital tract: functions in protection, secretion, and absorption. Connective tissue: loosely organized and composed of cells embedded in a matrix of protein. Bres and ground substance = carrot shavings + jell-o. Usually binds organs or tissues to one another. Matrix is the stuff that the cells surround themselves w/ Six different types: loose connective tissue, adipose tissue, blood (liquid matrix, fibrous c. t (connective tissue, cartilage. Friday, september 28, 2018: bone (solid matrix)
