Chara (alga), a genus of algae in the family Characeae. Chara (moth), a genus of moths in the family Noctuidae. CHARA array, a telescope. Beta Canum Venaticorum or Chara, a star. Chara or Southern dogs, a constellation including Beta Canum Venaticorum and Cor Caroli.
Simple squamous epithelium can be studied by looking at cells which line blood and lymph vessels. These flattened cells are called endothelial cells . The nuclei are frequently found protruding into the lumen of the vessel. Observe the numerous large blood vessels present in the periphery of this section.
In vessels larger than 1 mm in diameter a subendothelial layer of loose connective tissue (a basement membrane) supports the endothelium---- ---The tunica media is the middle layer and consists circularly arranged smooth muscle cells and sheets of elastin.) Three distinct layers or tunics form the walls of blood vessels: ---The tunica interna (tunica intima) is the innermost layer. It contains the endothelium which is a continuation of the endocardial lining of the heart.