Each of these smaller groups of undercoat hairs penetrate the skin through a common follicle opening, whereas the outercoat hair has a separate opening.

A team of engineers at Georgia Institute of Technology's Wearable Intelligent Systems and Healthcare Center, working with ...

Typical are so-called hair tufts, where multiple hair shafts emerge from one dilated follicle opening ... reaches deeper structures of the skin (Figure 1). It predominantly occurs in African ...