The ornamental design for an artificialtendon, as shown and described.
FIG. 1 is a perspective view of an artificial tendon;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a right side view thereof; and,
FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 3.
It is noted that a bottom plan view of the artificial tendon is identical to the top plan view of FIG. 2, a rear view of the artificial tendon is identical to the front view of FIG. 3, and a left side view of the artificial tendon is identical to the right side view of FIG. 4.