Sentence:  Class 1. consists of nervous diseases, such as depend on the nervous and muscular systems; the second, of sanguine diseases, such as depend on the sanguiferous system; the third, of secretory diseases, or such as are connected with the state of the secretions; and the fourth, of <WSD>structural</WSD> diseases, or those that are connected with the nutritive powers. 
Meaning of the word marked with <WSD> tags:  Of, relating to, or having structure.