Hair Anatomy, Physiology, and Nutrition
A basic understanding of anatomy, physiology, and nutrition helps natural hair care professionals understand how the body functions and how overall health can affect the hair, scalp, and skin. While beauty professionals do not diagnose medical conditions, they should understand the relationship between healthy body systems and healthy hair growth.
This section introduces the structure and function of cells, tissues, organs, and body systems that influence hair and scalp health. Students learn about the integumentary system, circulatory system, muscular system, nervous system, skeletal system, digestive system, and respiratory system, as well as the role each plays in maintaining healthy hair and skin.
The section also explores the importance of proper nutrition, hydration, vitamins, minerals, proteins, and other nutrients that contribute to healthy hair growth and scalp function. Understanding these concepts helps beauty professionals recognize factors that may affect the condition of a client’s hair and scalp and provide informed recommendations within their professional scope of practice.
The questions in this chapter begin with foundational anatomy and physiology concepts and gradually progress to more advanced topics involving body systems, hair growth, nutrition, circulation, and professional application.
Practice Questions
1. Anatomy is the study of:
A. Body structure
B. Body function
C. Hair coloring
D. Salon safety
Correct Answer: A
2. Physiology is the study of:
A. Body structure
B. Body function
C. Hair texture
D. Hair growth only
Correct Answer: B
3. The basic unit of all living things is the:
A. Tissue
B. Organ
C. Cell
D. Follicle
Correct Answer: C
4. A group of similar cells working together forms:
A. An organ system
B. Tissue
C. Hair
D. A gland
Correct Answer: B
5. The skin is the body’s largest:
A. Muscle
B. Organ
C. Bone
D. Gland
Correct Answer: B
6. The outermost layer of the skin is the:
A. Dermis
B. Epidermis
C. Cortex
D. Medulla
Correct Answer: B
7. Hair grows from a:
A. Sweat gland
B. Hair follicle
C. Muscle
D. Nerve
Correct Answer: B
8. Sebaceous glands produce:
A. Sweat
B. Blood
C. Sebum
D. Keratin
Correct Answer: C
9. Sebum helps:
A. Lubricate the hair and scalp
B. Dry the scalp
C. Remove hair color
D. Slow hair growth
Correct Answer: A
10. The circulatory system transports:
A. Oxygen and nutrients
B. Shampoo
C. Hair products
D. Keratin only
Correct Answer: A
11. The nervous system controls:
A. Communication throughout the body
B. Hair density only
C. Hair color only
D. Sebum production only
Correct Answer: A
12. The digestive system helps:
A. Absorb nutrients from food
B. Produce hair color
C. Form hair follicles
D. Increase density
Correct Answer: A
13. Protein is important because hair is primarily made of:
A. Calcium
B. Keratin
C. Water only
D. Sebum
Correct Answer: B
14. Water is important because it helps:
A. Maintain hydration
B. Reduce circulation
C. Stop growth
D. Eliminate nutrients
Correct Answer: A
15. A balanced diet contributes to:
A. Healthy hair and scalp
B. Hair disorders only
C. Reduced circulation
D. Poor elasticity
Correct Answer: A
16. Healthy hair growth depends on:
A. Proper nutrition
B. Good circulation
C. Overall health
D. All of the above
Correct Answer: D
17. Why is knowledge of anatomy important for a braider?
A. It helps identify normal and abnormal conditions of the hair, scalp, and skin
B. It replaces consultation procedures
C. It eliminates sanitation requirements
D. It guarantees hair growth
Correct Answer: A
18. Which body system is MOST directly responsible for delivering nutrients to hair follicles?
A. Skeletal system
B. Circulatory system
C. Digestive system
D. Muscular system
Correct Answer: B
19. Why is poor nutrition often reflected in the hair and scalp?
A. Hair follicles rely on nutrients delivered through the bloodstream
B. Hair grows independently of the body
C. Nutrition only affects skin
D. Hair does not require nutrients
Correct Answer: A
20. Damage to which structure may affect future hair growth?
A. Hair follicle
B. Cuticle only
C. Hair shaft only
D. Sebaceous gland only
Correct Answer: A
21. Which system works closely with the circulatory system to supply oxygen throughout the body?
A. Muscular system
B. Respiratory system
C. Skeletal system
D. Endocrine system
Correct Answer: B
22. Why is circulation important to healthy hair growth?
A. It supplies oxygen and nutrients to the follicles
B. It changes hair texture
C. It permanently increases density
D. It produces keratin directly
Correct Answer: A
23. Which nutrient is MOST associated with building and repairing body tissues?
A. Protein
B. Water
C. Oxygen
D. Fiber
Correct Answer: A
24. A client with poor nutrition may experience:
A. Weak or brittle hair
B. Increased breakage
C. Reduced hair quality
D. All of the above
Correct Answer: D
25. Why should beauty professionals understand the integumentary system?
A. It includes the skin, hair, and related structures
B. It controls digestion
C. It regulates blood pressure only
D. It produces oxygen
Correct Answer: A
26. Which statement BEST explains the relationship between nutrition and hair?
A. Hair health is influenced by overall body health and nutrient intake
B. Hair health is unrelated to diet
C. Nutrition affects only skin
D. Hair receives nutrients from shampoo only
Correct Answer: A
27. Why is water essential for healthy hair and scalp function?
A. It supports hydration and cellular processes
B. It permanently repairs damage
C. It eliminates the need for nutrients
D. It increases density automatically
Correct Answer: A
28. Which client habit would MOST negatively affect healthy hair growth?
A. Balanced nutrition
B. Chronic nutritional deficiencies
C. Proper hydration
D. Regular scalp care
Correct Answer: B
29. Which nutrient deficiency is MOST likely to affect keratin production and hair strength?
A. Protein deficiency
B. Water deficiency only
C. Oxygen deficiency only
D. Fiber deficiency only
Correct Answer: A
30. A healthy circulatory system contributes to:
A. Efficient nutrient delivery
B. Oxygen transport
C. Healthy follicles
D. All of the above
Correct Answer: D
31. A client complains of excessive hair shedding and reports a highly restrictive diet. Which factor should the stylist recognize as a possible contributor?
A. Nutritional deficiencies affecting follicle function
B. Increased sebum production
C. Improved circulation
D. Increased hair density
Correct Answer: A
32. Which statement BEST describes the relationship between the respiratory and circulatory systems?
A. One supplies oxygen while the other transports it throughout the body
B. They perform identical functions
C. Neither affects hair growth
D. They only affect muscles
Correct Answer: A
33. Damage to the hair shaft differs from damage to the follicle because:
A. Follicle damage may affect future growth, while shaft damage affects existing hair
B. Both are identical
C. Shaft damage permanently stops growth
D. Follicle damage only affects shine
Correct Answer: A
34. A stylist notices unusually dry hair and scalp. Which consultation question would be MOST appropriate?
A. “How much water do you typically drink each day?”
B. “What is your favorite hairstyle?”
C. “Do you prefer mornings or evenings?”
D. “What color is your vehicle?”
Correct Answer: A
35. Why should beauty professionals understand basic nutrition?
A. Nutritional habits can influence hair, skin, and scalp health
B. Nutrition has no effect on beauty services
C. Stylists are expected to prescribe diets
D. Nutrition only affects children
Correct Answer: A
36. Which client would be MOST likely to experience nutrition-related hair concerns?
A. A client with long-term poor dietary habits
B. A client who drinks adequate water
C. A client with balanced nutrition
D. A client who exercises regularly
Correct Answer: A
37. Which structure is responsible for producing new hair cells?
A. Hair follicle
B. Cuticle
C. Hair shaft
D. Sebaceous gland
Correct Answer: A
38. A beauty professional notices signs that may indicate a health-related issue affecting the hair. What is the MOST appropriate response?
A. Recommend medical evaluation when appropriate
B. Diagnose the condition
C. Prescribe medication
D. Ignore the symptoms
Correct Answer: A
39. Which statement BEST explains why overall wellness affects hair growth?
A. Hair follicles depend on nutrients, oxygen, hydration, and healthy body functions
B. Hair growth is controlled only by shampoo
C. Hair is unaffected by internal health
D. Hair depends only on styling habits
Correct Answer: A
40. A knowledgeable beauty professional understands that healthy hair growth depends on:
A. Proper nutrition
B. Healthy body systems
C. Adequate circulation
D. All of the above
Correct Answer: D
Reference and Recommendation
