The viscosity of a crude oil affects our ability to pump it out of the ground; the viscosity and volatility of a fuel affect how easy it is to atomize in the fuel injector; the viscosity of a lubricant affects its ability to protect an engine.
ramus (plural rami) ( 1 biology) A branching, as of nerves or blood vessels. ( 2 ornithology) The stem of a barb of a feather, from which the barbules extend. ( 3 anatomy) A bony projection, particularly of the jaw, but also in the groin area, both subject to the maturing process of symphysis.
The head of a bone usually refers to the proximal end of the bone. The shaft refers to the elongated sections of long bone, and the neck the segment between the head and shaft (or body). The end of the long bone opposite to the head is known as the base. ramus refers to an extension of bone, such as the ramus of the mandible in the jaw or Superior pubic ramus. Ramus is derived from branch (Latin: Ramus) and may also be used to refer to nerves, such as the ramus communicans.