Leg pain may be caused by a problem in the leg, but often the root cause of the problem starts in the lower back, where the sciatic nerve originates, and then travels along the path of the nerve (called sciatica).
Define surf: the swell of the sea that breaks upon the shore; the foam, splash, and sound of breaking waves â surf in a sentence the swell of the sea that breaks upon the shore; the foam, splash, and sound of breaking wavesâ¦
Surfactant is a complex substance containing phospholipids and a number of apoproteins. This fluid is produced by the Type II alveolar cells, and lines the alveoli and smallest bronchioles. Surfactant reduces surface tension throughout the lung.