Sentence:  For example , the marked susceptibility of the monkey to respiratory infection might be related to its delicate , long alveolar ducts and short , large bronchioles situated within a parenchyma <WSD>entirely</WSD> lacking in protective supportive tissue barriers such as those found in types 1 , and 3 , . 
Meaning of the word marked with <WSD> tags:  to a complete degree or to the full or entire extent (`whole' is often used informally for `wholly')