Why Should We Study the Structure of the Hair?

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/23/2020-04/08/2020 Pg 1-11

ELA STANDARDS: RL 11-12.2 Determine the meaning of words and phrases as they are used in the text, including figurative and connotative meanings; analyze the impact of specific word choices on meaning and tone. RL 11-12.1 Cite strong and thorough textual evidence to support analysis of what the text says explicitly as well as inferences drawn from the text, including determining where the text leaves matters uncertain.

AIM: Why should we study the structure of the hair?

CONTENT OBJECTIVES:

• Students will be able to explain the importance of studying the structure of the hair • Students will be able to name and describe the structure of the hair root • Students will be able to list and describe the layers of the hair shaft

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/23/2020 Page 2-11

Reading Activity # 1 This Photo by Unknown Directions: Please read the passage below, using the annotation symbols “annotate” passage below for better understanding of tier 3 words.

Men and women of all ages want healthy, attractive hair. As licensed Natural Hair Stylist professional, you will be called upon to advise all your clients on the best care and treatment of their hair both inside and outside the professional establishment. In order to provide the best possible counsel to your clients, you must have a thorough understanding of the hair and how it can be damaged. Hair is composed of different layers which are responsible for specific hair qualities. It is essential for you to be able to analyze a client’s hair, determine what type of damage the hair has experienced, and properly prescribe corrective treatments. None of these tasks will be possible without your knowledge of the various properties of the hair and scalp.

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/24/2020 Page 3-11

Writing Activity # 2 Directions: Based on reading passage please answer the question below in 50 words or more.

Question – Reading Prompt: “How will knowing about the underlying properties of the hair and scalp help me to be a more successful Hair Stylist?”

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/25/2020 Page 4-11

Reading and Writing Activity # 3 Directions: Please read the Teir 3 words and definitions below, Create Flash cards for vocabulary words and definitions on the back of flash cards. Terminology Term Definition

Trichology: Is the study of hair.

Purpose of Hair: The chief purposes of hair are adornment and protection of the head from heat, cold and injury.

Composition of the Hair: Hair is composed chiefly of the protein keratin, which is found in all horny growths including the nails and skin.

Divisions of the Hair :Full-grown human hair is divided into two principal parts: the root and the shaft.

1. The hair root is the portion of the hair structure located beneath the skin surface. 2. The hair shaft is the portion of the hair structure extending above the skin surface. Hair Shapes: Hair usually has one of three general shapes. As it grows out, hair assumes the shape, size and curve of the follicle. 1. Straight hair is usually round. 2. Wavy hair is usually oval. 3. Curly or kinky hair is usually flat.

Direction of Hair Growth: Hair flowing in the same direction is known as the hair stream. Hair that forms a circular pattern, as in the crown, is called a whorl. A tuff of hair standing up is known as a cowlick.

Layers of the hair: The structure of the hair is composed of cells arranged in three layers.

1. Cuticle – the outside horny layer is composed of transparent, overlapping, protective scale like cells, pointing away from the scalp toward the hair ends. The cuticle protects the inner layers of the hair. 2. Cortex – the middle or inner layer, which gives strength and elasticity to the hair. This layer contains pigment, which gives the hair its color. 3. Medulla – the innermost layer of the hair is referred to as the pith, or marrow, of the hair shaft and is composed of round cells. Hair Distribution Hair is distributed all over, the body, except on the palms of the hands, soles of the feet, lips, and eyelids. There are three types of hair on the body.

1. Long hair – Protects the scalp against the sun’s rays and injury, gives a dormant to the head and forms a pleasing frame for the face. Soft long hair grows in the armpits of both sexes and on the faces of men. 2. Short or Bristly hair – grows in the eyebrows and eyelashes, adds beauty and color to the face. Eyebrows divert sweat from the eyes. The eyelashes help protect the eyes from dust particles and light glare. 3. Lanugo – this type of hair is fine, soft, downy hair on the cheeks, forehead and nearly all other areas of the body.

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/26/2020

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Writing Activity # 4 Directions: Based on vocabulary words and hair structure notes on pg 4-11 answer question below in 70 words or more

Questions – Reading Prompts: “How will knowing about the layers of hair and how they work effect the products you put in your hair and your customers hair?” “Explain if you agree or disagree , give examples”

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/27/2020 Page 6-11 This Photo by Unknown Reading Activity # 5 Directions: Please read the passage below, using the annotation symbols “annotate” passage below for better understanding of tier 3 words.

The Hair Growth Cycle

Everyone has approximately 100,000 hairs on their head. Normally, about 100 scalp hairs reach the end of the resting phase each day and fall out. New hairs grow at approximately the same rate that the old hairs shed. Eyebrows and eyelashes have a growing phase of 1 to 6 months. Scalp hairs have a growing phase of 2 to 6 years. Hair recycles itself every 2 to 6 years and is genetically programmed to grow and shed. Your hair follicle adheres to a genetically programmed schedule that includes growth, resting and hair shedding; then the regrowth of new hair. During its lifetime, a human hair goes through three stages: 1.Anagen - Growth Phase 2. Catagen - Transitional phase 3. Telogen - Resting Phase Each hair passes through the phases independent of the neighboring hairs.

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/28/2020 Page 7-11

Writing Activity # 6 Directions: Based on vocabulary words and hair structure notes on pg 4-11 answer question below in 70 words or more

Question – Reading Prompts:

“Do you think it matters how our hair grows and where it grows on the body? Why or why not?” “What would happen if we did not grow hair on our bodies? What sickness or issues could occur?” Give Examples

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/29/2020 Page 8-11

Reading and Writing Activity # 7 Directions: Please read the Teir 3 words and definitions below, Create Flash cards for vocabulary words and definitions on the back of flash cards. Terminology Term Definition

The Hair Growth Cycle

Anagen Phase - Growth Phase Approximately 85% of all hairs are in the growing phase at any one time. The Anagen phase or growth phase can vary from two to six years. Hair grows approximately 10cm per year and any individual hair is unlikely to grow more than one meter long.

Catagen Phase - Transitional Phase At the end of the Anagen phase the hairs enters into a Catagen phase which lasts about one or two weeks, during the Catagen phase the hair follicle shrinks to about 1/6 of the normal length. The lower part is destroyed and the dermal papilla breaks away to rest below.

Telogen Phase - Resting Phase The resting phase follows the catagen phase and normally lasts about 5- 6 weeks. During this time the hair does not grow but stays attached to the follicle while the dermal papilla stays in a resting phase below. Approximately 10-15 percent of all hairs are in this phase at an one time.

At the end of the Telogen phase the hair follicle re-enters the Anagen phase. The dermal papilla and the base of the follicle join together again and a new hair begins to form. If the old hair has not already been shed the new hair pushes the old one out and the growth cycle starts all over again.

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/30/2020 Page 9-11 This Photo by Unknown Reading Activity # 8 Directions: Please read the passage below, using the annotation symbols “annotate” passage below for better understanding of tier 3 words.

Structure of Hair

Hair is composed of strong structural protein called keratin. This is the same kind of protein that makes up the nails and the outer layer of skin. Each strand consists of 3 layers: 1.An innermost layer or medulla which is only present in large thick hairs. 2.The middle layer known as the cortex. The cortex provides strength and both the color and the texture of hair. 3.The outermost layer is known as the cuticle. The cuticle is thin and colorless and serves as a protector of the cortex.

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 03/31/2020 Page 10-11

Writing Activity # 9 Directions: Based on vocabulary words and hair structure notes on pg 9-11 answer question below in 50 words or more

Question – Reading Prompts:

“What if our hair was composed of yarn or thread do you think that would change how our hair looks or if our hair falls out why or why not?” Explain and give examples “What if our hair only hair 1 layer how would that effect how our hair grows, takes color, or breaks?” Give Examples

Teacher: Ms. Roshann Richards Course: Natural Hairstyling Unit: Hair Anatomy and Physiology Topic: Hair Structure Date: 04/01/2020 Page 11-11

Writing Activity # 10 Directions: Based on vocabulary words and hair structure notes on pg 9-11 answer question below in 50 words or more

Question – Reading Prompt:

““What if our hair only hair 1 layer how would that effect how our hair grows, takes color, or breaks?” Give Examples