Sentence:  Each person's unique mixture of these substances determines his temperament: a predominance of blood gives a sanguine temperament; a predominance of <WSD>phlegm</WSD> makes one phlegmatic; yellow bile, bilious (or choleric); and black bile, melancholic. 
Meaning of the word marked with <WSD> tags:  One of the four humors making up the body in ancient and mediaeval medicine; said to be cold and moist, and often identified with mucus. (from 13th c.)