Surfactant is a complex substance containing phospholipids and a number of apoproteins. This essential fluid is produced by the Type II alveolar cells, and lines the alveoli and smallest bronchioles.
William and Anne Shakespeare had three children. Their first child was Susanna, born a mere six months after the wedding of her parents. She was christened on May 26, 1583, and twins arrived in January, 1585.
Indeed, the seven-year period between 1585 (when his twin children were born) and 1592 (when Robert Greene called him an upstart crow) is known as Shakespeare's lost years because no evidence has survived to show exactly where he was or why he left Stratford for London.