BIO 101 Lecture Notes - Lecture 10: Free Surface, Nervous Tissue, Muscle Tissue
Document Summary
Tissues: definition: a group of cells that work together to serve a common function. Epithelial tissue (covers body surfaces, lines body cavities and organs, and forms gland) Connective tissue (serves as storage site for fa, plays an important role in immunity, and provides organs and body with protection and support) Muscle tissue (responsible for body movement and for movement of substances through body) Nervous tissue (conducts nerve impulses from one part of the body to another: epithelial tissue: shares two characteristics, A free surface, which is specialized for protection, secretion and absorption. The basement membrane, which is a non-cellular layer that binds the epithelial cells to underlying connective tissue and helps it resist stretching. Gland: group of cells whose main functions is excretion. Produces a substance that is released into the blood stream. Described as body"s glue support and binds together other tissues. Cells are embedded in an extracellular matrix. Protein fibers produced by fibroblasts: collagen, elastic, reticular.
