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.
What are the tunica intima of the veins and arteries composed of? The tunica intima is the inner most layer of the artery. It is made up of a layer of ndothelial cells, supported by th internal elastic lamina. The endothelial cells are actuaâ¦lly in direct contact with the blood. The endothelium cells are polygonal, oval, or fusiform, having a vry distinct round or oval nuclei.