Fun Fact: Arrector Pilus

Anatomy Def: Arrector pili (pl.) are small muscles attached to hair follicles. Contraction of these muscles pulls hairs upright, sometimes causing “goose bumps.” 

Outlander Def: Beard hairs grant Claire endless moments of fascination. Stroking beard hairs causes arrector pili muscles to contract and raise the hairs –  making shaving easier.

Learn about arrector pili (pl) muscles in Anatomy Lesson #6, “Claire’s Hair – Jamie’s Mane” or “Jesus H. Roosevelt Christ!”

Arrector pili are smalll spindle-shaped muscles at the base of our body hairs. Under involuntary control, various stimuli cause arrector pili to contract including stroking, cold, fright, and aggression. Contraction may also aid expulsion of sebum from skin sebaceous glands. 

Read about Jamie’s facial hairs in Voyager book, where, aboard the Artemis, Claire contemplates his substantial beard. Herself has a such way with words!

“… I wish you wouldn’t shave your beard just yet,” I added, as he bent to set down the tray he was holding. 

“Why not?” He glanced curiously over his shoulder at me, and I felt the heat rising in my cheeks.

“Er … well. It’s a bit … different.” 

“Oh, aye?” He stood up and took a step toward me.

… The dark blue eyes had slanted into triangles of amusement. 

“How, different?” he asked. 

“Well, it … um …” I brushed my fingers vaguely past my burning cheeks. “It feels different. When you kiss me. On my … skin.” 

See Claire gently stroke Jamie’s beard in Outlander episode 313, Eye of the Storm. Warning! Warning! Arrector pili muscles on high alert! <G>

The deeply grateful,

Outlander Anatomist

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Photo Credit: Sony/Starz