Hair of Trunk (Pili trunci)
Educational content only — not medical advice.
Anatomy
The hair of the trunk comprises the terminal and vellus hair shafts emerging from follicular epidermal units distributed across the chest, abdomen, and back. Formed of keratinized epithelial filaments produced by the hair bulb, it plays physiological roles in tactile tactile sensation, dispersion of pheromonal secretions, and skin barrier homeostasis.
Clinical notes
Androgen-mediated conversion of vellus to terminal hair on the trunk occurs during male puberty; excessive trunk hirsutism in females signals androgen excess (polycystic ovary syndrome or adrenal hyperplasia).
Related structures
Educational references
FAQ
What is the role of the Hair of Trunk?
The hair of the trunk comprises the terminal and vellus hair shafts emerging from follicular epidermal units distributed across the chest, abdomen, and back. Formed of keratinized epithelial filaments produced by the hair bulb, it plays physiological roles in tactile tactile sensation, dispersion of pheromonal secretions, and skin barrier homeostasis.
Why is the Hair of Trunk clinically important?
Androgen-mediated conversion of vellus to terminal hair on the trunk occurs during male puberty; excessive trunk hirsutism in females signals androgen excess (polycystic ovary syndrome or adrenal hyperplasia).
Source & license
BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/). license details