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.
Best Answer: The answer is C. Ependymal cells are neuroglia (supporting cells) that are ciliated, produce Cerebrospinal Fluid, and move them around the ventricles with the use of their cilia. * Schwann Cells are found in the Peripheral Nervous System, not in Central Nervous System. * Oligodendrocytes are found around axons, and do not produce CSF.