FIG. 1 is a front view of a blood testing chip showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

Portions of the disclosure shown in broken lines form no part of the claimed design.