The combining form trich refers to which body structure?

• A. Skin
• B. Hair
• C. Bone
• D. Muscle

Answer: (B)

Trich- is the combining form for hair. It comes from a Greek word meaning hair and shows up in terms like trichology (the study of hair) and other hair-related terms, so when you see this root you should think of hair. The body structure referred to here is the hair—the keratinized strands growing from follicles in the skin. Roots for skin, bone, or muscle use different prefixes (derm- or cutis for skin, osteo- or ost- for bone, myo- or sarc- for muscle), so they wouldn’t be indicated by trich-.