Science. 1  Chara (alga), a genus of algae in the family Characeae. 2  Chara (moth), a genus of moths in the family Noctuidae. 3  CHARA array, a telescope.  Beta Canum Venaticorum or Chara, a 1  star. Chara or Southern dogs, a constellation including Beta Canum Venaticorum and Cor Caroli.
/mesoÂ·theÂ·liÂ·um/ (-theÂ´le-um) the layer of cells, derived from mesoderm, lining the body cavity of the embryo; in the adult, it forms the simple squamous epithelium that covers all true serous membranes (peritoneum, pericardium, pleura).mesotheÂ´lial.
Mucous membranes, also called mucosa, line the inside of cavities that open directly to the exterior environment. Mucous membranes line the gastrointestinal tract, respiratory tract, reproductive tracts and the urinary tract.This type of membrane is composed of an epithelial cell layer and an underlying connective tissue layer.The epithelial layer is an important defense mechanism that prevents the entry of pathogens and microbes into the body. The cells are tightly packed together, so fluid cannot leak through the epithelial layer.his type of membrane is composed of an epithelial cell layer and an underlying connective tissue layer. The epithelial layer is an important defense mechanism that prevents the entry of pathogens and microbes into the body. The cells are tightly packed together, so fluid cannot leak through the epithelial layer.