ITEC Anatomy & Physiology - Skin Practice Exam Prep & Study Guide

Comedones are a type of skin lesion that forms when hair follicles become clogged with sebum, which is the oil produced by sebaceous glands, as well as dead skin cells. This accumulation can lead to the formation of either open comedones, commonly known as blackheads, or closed comedones, known as whiteheads. The specific blocking of hair follicles by these substances is a fundamental characteristic of comedones, distinguishing them from other skin conditions.

Understanding comedones is crucial in the study of acne and other skin disorders, as their presence can indicate overactive sebaceous glands and disrupted skin cell turnover. This knowledge is important for effective skin care and treatment approaches.