BOOK III
Chapter [I]
A recapitulation of certain points previously demonstrated. Every part of the animal has an attractive and an alterative (assimilative) faculty; it attracts the nutrient juice which is proper to it. Assimilation is preceded by adhesion (prosphysis) and that again, by application (prosthesis). Application the goal of attraction. It would not, however, be followed by adhesion and assimilation if each part did not also possess a faculty for retaining in position the nutriment which has been applied. A priori necessity for this retentive faculty.
Chapter [II]
The same faculty to be proved a posteriori. Its corresponding function (i.e. the activation of this faculty or potentiality) well seen in the large hollow organs, notably the uterus and stomach.
Chapter [III]
Exercise of the retentive faculty particularly well seen in the uterus. Its object is to allow the embryo to attain full development; this being completed, a new faculty—the expulsive—hitherto quiescent, comes into play. Characteristic signs and symptoms of pregnancy. Tight grip of uterus on growing embryo, and accurate closure of os uteri during operation of the retentive faculty. Dilatation of os and expulsive activities of uterus at full term, or when foetus dies. Prolapse from undue exercise of this faculty. Rôle of the midwife. Accessory muscles in parturition.