<span>In arteries, the thick layer of elastic fibers associated with the tunica intima is called the "Internal Elastic Membrane"
Hope this helps!</span>
It can have a granitic composition for the reason that it can be composed of the similar minerals like that of granite, however the magma cools right away prior to crystals having a chance to form in the rock rather than forming into a rock created with interlocking crystals.
Some forces act at a distance and therefore do not require contact with the object they are acting on.
A great example of this is gravity.
There are two types of cells. One is an animal cell, which has the mitochondria, and the other is a plant cell, which I believe does not have the mitochondria.
Hope this helps!