What type of fingerprint pattern is identified as a loop?

A loop fingerprint pattern is characterized by ridges that enter and exit on the same side, creating a specific flow that differentiates it from other patterns. This entry and exit on the same side is essential for identifying loops, as it demonstrates the distinctive directional movement of the ridges. Loops can further be classified into radial and ulnar loops based on the direction they open, but their defining feature remains that they do not form a complete circuit like an arch would. This feature is crucial for forensic analysis and fingerprint identification, helping professionals categorize and compare prints effectively. Understanding this characteristic is key to distinguishing loops from other fingerprint patterns, such as arches, which have a different ridge flow.