28
Porousness of a body for transpiration healthy for those from whom more is taken; denseness of body for transpiration unhealthy for those from whom less is taken. Those who transpire freely are weaker, healthier, and recover easily; those who transpire hardly are stronger before they are sick, but on falling sick they make difficult recovery. These for both whole and part.
29
The lungs draw a nourishment which is the opposite of that of the body, all other parts draw the same.
30
Beginning of nutriment of breath, nostrils, mouth, throat, lungs, and the transpiratory system generally. Beginning of nutriment, both wet and dry, mouth, oesophagus, stomach. The more ancient nutriment, through the epigastrium, where the navel is.
31
Root of veins, liver; root of arteries, heart. Out of these travel to all parts blood and breath, and heat passes through them.
32
Power one, and not one, by which all these things and those of a different sort are managed; one for the life of whole and part, not one for the sensation of whole and part.
33
Milk nutriment, for those to whom milk is a natural nutriment, but for others it is not. For some wine is nutriment, for others not. So with meats and the other many forms of nutriment, the differences being due to place and habit.
34
Nourishment is sometimes into growth and being, sometimes into being only, as is the case with old men; sometimes in addition it is into strength. The condition of the athlete is not natural. A healthy state is superior in all.
