the disk in the fundus of the eye marking the point at which the optic nerve enters; it is accompanied by blood vessels, is oval, light in color and the blind spot of the retina.
ARTERIOLES. In arterioles, the tunica intima consists of a continuous endothelium and a very thin subendothelial layer. In addition, a thin, fenestrated internal elastic lamina is present in larger arterioles but absent in terminal arterioles. Generally, the tunica media consists of 2 layers of smooth muscle cells.
Blood Vessels. 1. Simple squamous epithelial tissue called ____________________ forms. the inner linings of the tunica interna of blood vessels. 2. The ____________________ of an artery wall contains many smooth. muscle cells. 3. The ____________________ of an artery wall is largely composed of. connective tissue.