Forensics Hair and Fibers

Front

What is the outermost layer of a hair called?

Back

Cuticle

Front

What should a detective NOT do when collecting hair as evidence?

Back

Cut hairs from the suspect’s head.

Front

What type of medulla is commonly found in the hairs of Native Americans and Asians?

Back

Continuous medulla.

Front

What is the most common type of regenerated fiber derived from cellulose?

Back

Rayon.

Front

How is hair with a round cross section and a large diameter classified?

Back

Asian.

Front

What are the three main layers of a hair strand?

Back

Cuticle, cortex, and medulla.

Front

What is the function of the cuticle in hair?

Back

Protects the inner layers of the hair.

Front

What is the difference between natural and synthetic fibers?

Back

Natural fibers are derived from plants or animals, while synthetic fibers are man-made.

Tags

NGSS.MS-PS1-3

Front

What is the significance of the medulla in forensic hair analysis?

Back

It helps in identifying the species and sometimes the individual from which the hair originated.

Front

What are the characteristics of a medullary pattern?

Back

It can be continuous, fragmented, or absent.