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.
My friends and family say I am obsessive about the subject. Shakespeare had three children. Susannah was born in May 1583, six months after William married Anne (so Anne was pregnant at the time of the wedding). Two years later (1585) the twins Judith and Hamnet (girl and boy) arrived.
A few years after he left school, in late 1582, William Shakespeare married Anne Hathaway. She was already expecting their first-born child, Susanna, which was a fairly common situation at the time. When they married, Anne was 26 and William was 18.