BIOL 2030 Lecture Notes - Lecture 2: Simple Squamous Epithelium, Nervous Tissue, Nerve Net
Document Summary
Five grades of organization within animal and animal-like groups (a) protozoa, protista (unicellular eukaryotes) Protozoa is incorrect when referring to ribosomes since it refers to animals, however, for purposes of course, the three terms will be used interchangeably j (b-e) metazoa. Protozoan cell - complete organism that conducts all basic functions of life (ie. lives independently) Metazoan cell - a single unit that is part of the whole organism; cannot live independently. (a) protoplasmic level of organization. All life functions within a single cell. Contractile vacuole > osmoregulation (b) cellular level of organization. Division of labor between cells (ex. reproduction, nutrition) Volvox-unicellular eukaryote where all of the cells are the same so its not very different at colonial stage, but they are still lumped together even though cells are the same) Sponges- cells are not arranged as two tissues, so it is a loose example of differentiated cells) Wednesday, january 6, 2016 (c) cell-tissue level of organization.
