What is the waxy oil produced by the sebaceous gland called?

The waxy oil produced by the sebaceous gland is called sebum. Sebum serves several important functions in maintaining skin health. It acts as a natural moisturizer, providing hydration to the skin and preventing it from becoming too dry. Additionally, sebum has antimicrobial properties, helping to protect the skin from harmful bacteria and fungi. The composition of sebum includes a mix of fatty acids, triglycerides, and wax esters, which contribute to its waxy consistency and protective qualities.

Other options, such as sebaceous fluid, keratin, and collagen, refer to different substances or types of proteins that are not produced by the sebaceous glands. Sebaceous fluid is a less common term and does not specifically denote the waxy oil produced by these glands. Keratin is a structural protein found in hair and nails, and collagen is a protein that provides structure and strength to the skin, but neither are related to the oily substance secreted by the glands. Thus, sebum is the correct term for the waxy oil produced by the sebaceous glands.