The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma (state of matter) interwoven with magnetic fields. It has a diameter of about 1,392,000 km, about 109 times that of Earth, and its mass (about 330,000 times that of Earth) accounts for about 99.86% of the total mass of the Solar System. Scientists calculate our Sun and solar system formed at the same time - a whopping 4.56 billion years ago.
Definition of crural. : of or relating to the thigh or leg; specifically : femoral crural artery.
In the spine, the epidural space (from Ancient Greek á¼ÏÎ¯, on, upon + dura mater also known as epidural cavity, extradural space or peridural space) is an anatomic space that is the outermost part of the spinal canal.n humans the epidural space contains lymphatics, spinal nerve roots, loose connective tissue, fatty tissue, small arteries, and a network of internal vertebral venous plexuses.