Which fingerprint pattern features ridges that enter from one side, rise in the center, and exit on the same side?

The fingerprint pattern that features ridges entering from one side, rising in the center, and exiting on the same side is known as a loop. Loops are characterized by their unique structure where the ridges create a circular or semi-circular path as they flow towards the center and return back to the same side. This distinct flow makes loops the most common type of fingerprint pattern.

In contrast, whorls form circles or spirals and have ridges that enter from multiple sides before exiting, while arches are recognized for their ridges that enter on one side and exit on the opposite side without looping. Tented arches also feature a rise in the center but have a more pronounced angular structure. Thus, while there are various fingerprint patterns, the defining features of a loop clearly align with the description provided in the question.