Sentence:  Mrs. Trempler was tuberculosis , Mrs. Surcliffe was Mothers ' March of Dimes , Mrs. Craven was cancer , and Mrs. Gilkson did the <WSD>kidney</WSD> . 
Meaning of the word marked with <WSD> tags:  either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine