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.
pleural effusion, an abnormal accumulation of fluid in the intrapleural spaces of the lungs. It is characterized by chest pain, dyspnea, adventitious lung sounds, and nonproductive cough. The fluid is an exudate or a transudate from inflamed pleural surfaces and may be aspirated or surgically drained.leural effusion. the presence of fluid in the pleural space, between the membrane encasing the lung and that lining the thoracic cavity; types include chylothorax, hemothorax, hydrothorax, and pyothorax (empyema).