Hair Structure Lesson

Hair Structure Lesson

Learning Objectives

At the end of the lesson you will be able to identify the visible part of the hair above the skin. At the end of the lesson you will understand the composition of the hair strand and name the protein it is made of. At the end of the lesson you will be able to locate and describe the part of the hair beneath the skin's surface. At the end of the lesson you will be able to explain the structure and function of the hair bulb. At the end of the lesson you will be able to distinguish the layer of hair responsible for color and texture. At the end of the lesson you will be able to determine the truth of statements regarding hair anatomy. At the end of the lesson you will be able to describe the function of the hair follicle, hair matrix, cortex, and cuticle. At the end of the lesson you will understand the factors that influence hair texture and color. At the end of the lesson you will be able to accurately draw and label a diagram of the hair structure.

What do you already know about the structure of hair?

Visible part of the hair strand

The hair shaft is the visible part of the hair strand above the skin.

Composition and protein of the hair strand

Hair strands are made of keratin, a tough protein.

Location of the hair beneath the skin

The hair follicle is the part of the hair beneath the skin's surface.

Structure and function of the hair bulb

The hair bulb is the bulb-shaped structure at the base of the hair follicle containing the hair matrix cells.

Layer responsible for hair color and texture

The cortex is the layer of hair that provides color and texture.

True and False statements about hair anatomy

A true/false section to assess understanding of the hair shaft, cuticle, medulla, cortex, and follicle.

Functions of hair follicle, matrix, cortex, and cuticle

Short answer questions delve into the roles and functions of the hair follicle, matrix, cortex, and cuticle.

Factors influencing hair texture and color

Short answer questions about the factors affecting hair texture and color.

Drawing and labeling a hair structure diagram

The worksheet requires the creation of a detailed hair structure diagram.

Definition List

hair shaft: The visible part of the hair strand above the skin. keratin: A tough protein that hair strands are made of. hair follicle: The part of the hair beneath the skin's surface. hair bulb: The bulb-shaped structure at the base of the hair follicle containing the hair matrix cells. cortex: The layer of hair that provides color and texture. cuticle: The outermost layer of the hair shaft. medulla: The innermost layer of the hair shaft. hair matrix: The area within the hair bulb where cells are produced, leading to hair growth.

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.