Final answer:
A small slit or crack-like sore that extends into the dermal area of the skin is called an ulcer. This type of wound goes deeper than an abrasion and requires proper care to avoid infection and further complications.
Step-by-step explanation:
A small slit or crack-like sore that extends into the dermal area is known as an ulcer. This is characterized by the loss of tissue and the formation of an area of inflammation. The term 'ulcer' covers a range of injuries that typically involve an open wound in the skin. Unlike an abrasion, which is more superficial, an ulcer extends into the dermal layer and can often lead to secondary infections if not treated properly. This contrasts with a laceration, which is usually a more irregular tear or cut, and a puncture, which refers to a narrow, pointed injury that goes deeper into the skin and possibly the tissues beneath. Ulcers can spread into a larger area and have different causes, including underlying health conditions, bacterias like MRSA, or physical factors such as pressure or friction.