RT Book, Section A1 Hordinsky, Maria K. A2 Soutor, Carol A2 Hordinsky, Maria K. SR Print(0) ID 1177006679 T1 Skin Diseases of the Scalp T2 Clinical Dermatology YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071769150 LK dermatology.mhmedical.com/content.aspx?aid=1177006679 RD 2024/04/23 AB The scalp is characterized by a high density of sweat glands and pilosebaceous units consisting of hair follicles, sebaceous glands, and arrector pili muscles. It is estimated that there are some 100,000 follicles on the scalp so this also means that there are about 100,000 sebaceous glands and associated arrector pili muscles.