Hair, dog

This is a dog hair.

· Diameter: fine to coarse (usually coarser than cat hairs); diameter may vary to give short hairs a barrel-like appearance
· Medulla: continuous, vacuolated to amorphous, occasionally very broad
· Scales: generally not prominent
· Unbanded: pigment occasionally very coarse and extending into root
· Root: spade-shaped

Image courtesy of Microscopy of Hair Part II: A Practical Guide and Manual for Animal Hairs Forensic Science Communications July 2004 - Volume 6 - Number 3.