How can the skin absorb oily substances?

The skin has several pathways through which it can absorb substances, including oily ones. One important method for absorption is through hair follicles, which provide a direct route for lipophilic (oil-loving) substances to penetrate deeper into the skin. The sebaceous glands, associated with these hair follicles, secrete sebum, which is a natural oil that helps to keep the skin moisturized. When oil-based products are applied to the skin, they can easily mix with sebum, enabling deeper penetration.

Additionally, while sweat glands primarily function in thermoregulation and excretion, the moisture they produce can create an environment that may facilitate the absorption of certain substances, particularly when mixed with oils. However, the primary pathway for the absorption of oily substances is through hair follicles, making them a key component of skin absorption.

Given this understanding, both the function of hair follicles and the role of sweat glands contribute to the skin's ability to absorb oils, which supports the validity of the response that includes both pathways.