dermal ridges

Do Dermal Papillae Make Fingerprints? It is characterized by dermal papillae, little bumps that protrude up into the bottom of the epidermis. … These ridges cause ridges in the overlying epidermis, called epidermal ridges. Those ridges and the sweaty marks they leave are what we call fingerprints. How are fingerprint patterns formed? Fingerprints are the