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.
34,191 pages on this wiki. The epidural space (sometimes called the extradural space) is a part of the human spine inside the spinal canal separated from the spinal cord and its surrounding cerebrospinal fluid by the dura mater.he epidural space is also of clinical interest since its cranial part contains vessels (e.g. the middle meningeal artery) susceptible to lesions after head traumas, causing a potentially lethal (if not treated immediately) collection of blood called an extradural or epidural hematoma.