[22] Work or product. Lat. opus. cf. p. 3, [note 2].
[23] Operation, activation, or functioning. Lat. actio. cf. loc. cit.
[24] i.e. a concomitant (secondary) or passive affection. Galen is contrasting active and passive “motion.” cf. p. 6, [note 1].
[25] As already indicated, there is no exact English equivalent for the Greek term physis, which is a principle immanent in the animal itself, whereas our term “Nature” suggests something more transcendent; we are forced often, however, to employ it in default of a better word. cf. p. 2, [note 1].
[26] In Greek anadosis. This process includes two stages: (1) transmission of food from alimentary canal to liver (rather more than our “absorption”); (2) further transmission from liver to tissues. Anadosis is lit. a yielding-up, a “delivery;” it may sometimes be rendered “dispersal.” “Distribution” (diadosis) is a further stage; cf. p. 163, [note 4].
[28] Since heat and cold tend to cause diffusion and condensation respectively.
[29] Lit. haematopoietic. cf. p. 11, [note 3].
[30] Lit. peptic.
[31] Lit. sphygmic.