Only for those groups have scientists almost completely identified all the world's species. Biologists have yet to describe many species of plants, invertebrate animals and lichens. So the number of these species known to science increases substantially every year.
The interglandular tissue is also increased in quantity, and is crowded with large round, oval, or polygonal cells, termed decidual cells. Their enlargement is due to glycogen and lipid accumulation in the cytoplasm allowing these cells to provide a rich source of nutrition for the developing embryo.rom Wikipedia, the free encyclopedia. Before the fertilized ovum reaches the uterus, the mucous membrane of the body of the uterus undergoes important changes and is then known as the decidua.
Squamous epithelial cells are a sub-type of epithelial cells (cells which line glands and the inner and outer surfaces of the body). These cells are characterized as being ver â¦ y thin and flat epithelial cells and populate organs such as the skin and esophagus.pithelial cells are the individual cells of an epithelium, which is a layer of cells forming the surface of a structure or an inner lining. For example, there is an epithel â¦ ium lining the alimentary canal (gut), and another lining the alveoli of the lungs. Human skin also consists of epithelial cells.