The prevalence of Serratia species as a cause of nosocomial infections is diminishing, but these bacteria are still able to cause hospital outbreaks, especially in intensive care units.
A. Cells are arranged in tissues that provide specific functions for the body. Cells of different tissues are structured differently, which leads to their differences in function. The tissues of the human body include four major types. 1. Epithelial tissue is widespread throughout the body, covers organs, and lines body surfaces. 2. Epithelial tissues are anchored to a basement membrane, are made up of tightly packed cells containing little intercellular material, generally lack blood vessels, and are replaced frequently.
Epithelial tissue, or epithelium, is comprised of sheets of tightly packed cells that coat or line the inner part of hollow organs like the blood vessels, heart, liver, and stomach. Epithelial tissue cells are continually dividing for replacements of old, worn, or damaged cells.