Nursing HDP301 Lecture Notes - Lecture 1: Peptidoglycan, Prokaryote, Emulsion
Document Summary
Was a tailor, merchant & lens grinder. Discovered protozoa in 1674; bacterium in 1676. Viewed water under his microscope, which prompted the discovery of microbes. Names these microorganisms (cid:498)beasties(cid:499), for which we now call microbes. Leeuwenhoek"s discoveries are now classified into 6 different groups: bacteria, archaea, fungi, protozoa, algae, and small multicellular animals (he did not describe viruses though, since it requires an sem) His secrets and microscope designs died with him, and it took scientists nearly 100 years to create one to the same level of quality of his. Developed taxonomic system to naming and grouping plants and other organisms. Became either part of the animal or plant kingdom (and now, also fungi) Are prokaryotic cells (lack nuclei {genes are not surrounded by a membrane}) Bacterial cell walls are comprised of a polysaccharide called peptidoglycan. Archaea have cell walls, but are not made of peptidoglycan. Archaea are not known to cause disease. Can live in nearly any moist environment.
