Hair, negroid

Negroid hair:
* Shaft diameter: moderate to fine with considerable variation
* Pigment granules: densely distributed (hair shaft may be opaque) and arranged in prominent clumps
* Shaft: prominent twist and curl
* Cross-sectional shape: flattened

Image courtesy of Microscopy of Hair Part 1: A Practical Guide and Manual for Human Hairs; Forensic Science Communications.