Hair

Definition

Hair is a protein filament that grows from follicles found in the dermis. It plays a key role in protecting the skin and regulating body temperature.

5 Must Know Facts For Your Next Test

1. Hair health is influenced by nutritional intake, particularly vitamins and minerals like biotin, zinc, and iron.
2. Protein deficiency can lead to hair thinning and loss because hair is primarily made of keratin, a type of protein.
3. Essential fatty acids are crucial for maintaining scalp health and promoting hair growth.
4. Certain medical conditions related to poor nutrition, such as anemia or hypothyroidism, can negatively impact hair growth and quality.
5. Vitamin deficiencies, especially Vitamin D and B vitamins, can result in dry, brittle hair.

Review Questions

• How does protein intake affect hair health?
• Which vitamins and minerals are essential for maintaining healthy hair?
• What role do essential fatty acids play in maintaining scalp health?

Related terms

Keratin:

A fibrous structural protein that makes up the outer layer of human skin as well as hair and nails.

Biotin:

A B-vitamin (Vitamin B7) that supports the health of the skin, nerves, digestive tract, metabolism, and cells.

Follicle: The small secretory cavity from which hair grows that is located in the dermis layer of the skin.