It's important to note that a diamond's carat weight does not equal size. Because of differences in depth and cut, two diamonds with identical diameters may in fact be two completely different sizes. Therefore, it is possible to buy a diamond that looks bigger than another that may actually have a smaller carat weight. When buying a diamond, consider the length, width and depth of a stone as well as the surface of the diamond (the part that will actually show when the diamond is set).
The tunica adventitia is the outermost layer of the arteries and veins. The word 'adventitia' in tunica adventitia comes from the Latin 'adventicius,' which means 'coming from outside.' This strong outer layer is composed of connective tissue that allows the blood vessel to withstand forces acting on the vessel wall.ll arteries and veins contain three layers. The innermost layer is called the tunica intima. The muscular middle layer is called the tunica media, and the outermost layer is called the tunica adventitia.
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.