Red and white corpuscles in varying numbers and proportions infiltrate the tissue; all the cells which belong to the part, even those forming the walls of the vessels, are swollen, the nuclei contain more chromatin, and the changes in the nuclei which indicate that the cells are multiplying appear.

The blood vessels are dilated, and the part in every way gives the indication of a more active life within it.

There are also evidences of the tissue injury which has called forth all the changes which we have considered.

(Fig.

15.) [Illustration: FIG.