Emergency Medical Technician (EMT) Intermediate Practice Exam 2025 - Free EMT Intermediate Practice Questions and Study Guide

The primary function of sebum is to keep the skin soft and prevent cracking. Sebum is an oily substance produced by the sebaceous glands, which are located in the dermis layer of the skin. By coating the skin and hair, sebum serves as a natural moisturizer, helping to maintain skin hydration and elasticity. This layer of oil not only softens the skin but also acts as a barrier against environmental factors that can lead to dryness and irritation.

The role of sebum in skin health is crucial, especially in preventing the skin from becoming overly dry or cracking, which can lead to further complications, such as infections or irritation. While other options also mention important functions related to skin and body health, they do not accurately reflect the primary purpose of sebum, which is primarily focused on maintaining skin integrity and moisture.