Sentence:  From <WSD>cell</WSD> to <WSD>cell</WSD> of his brain crept the one thought; and the wild desire to live, most terrible of all man's appetites, quickened into force each trembling nerve and fibre. 
Meaning of the word marked with <WSD> tags:  Specifically, any of the supposed compartments of the brain, formerly thought to be the source of specific mental capacities, knowledge, or memories. (14th-19th c.)