Sentence:  Tissues can be broadly classified as poorly-<WSD>perfused</WSD>, adequately <WSD>perfused</WSD> and well-<WSD>perfused</WSD> on this basis as shown in Table 2.1. Note how organs with a relatively small mass, such as the heart and brain, only require a modest blood flow to <WSD>perfuse</WSD> them well. 
Meaning of the word marked with <WSD> tags:  To permeate or suffuse something, especially with a liquid or with light.