Hair and Fiber Review

Front

What is the medullary index for a human hair?

Back

Generally less than 1/3.

Front

What is the name for man-made fibers?

Back

Synthetic fibers.

Tags

NGSS.MS-PS1-3

Front

How can we identify human hair?

Back

The medullary index is 0.33 or less.

Front

What is the middle layer of hair called?

Back

Cortex.

Front

What is the cortex of hair?

Back

The region of hair located outside of the medulla containing granules of pigments.

Front

What is the medulla in hair structure?

Back

The innermost layer of hair, which may be absent in some human hairs.

Front

What is the cuticle in hair structure?

Back

The tough outer covering of a hair composed of overlapping scales.

Front

What are natural fibers?

Back

Fibers that are derived from plants or animals.

Front

What are synthetic fibers?

Back

Fibers that are man-made, typically from chemical processes.

Tags

NGSS.MS-PS1-3

Front

What is keratin?

Back

A type of fibrous protein that makes up the majority of the cortex of a hair.