Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

5. Integumentary System

Introduction to the Integumentary System

Anatomy & Physiology

5. Integumentary System

Introduction to the Integumentary System

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Multiple Choice

Which of the following is the innermost layer of the hair follicle?

Cuticle

Sebaceous gland

Medulla

Cortex

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Verified step by step guidance

Understand the structure of the hair follicle: The hair follicle is composed of multiple layers, including the medulla, cortex, and cuticle. These layers are organized from the innermost to the outermost part of the hair shaft.

Define the medulla: The medulla is the innermost layer of the hair shaft. It is composed of loosely packed cells and air spaces, and it is present in thicker hairs but may be absent in finer hairs.

Define the cortex: The cortex is the middle layer of the hair shaft. It contains keratin and melanin, which provide strength, elasticity, and color to the hair.

Define the cuticle: The cuticle is the outermost layer of the hair shaft. It consists of overlapping cells that protect the inner layers and contribute to the hair's shine and smoothness.

Clarify the sebaceous gland: The sebaceous gland is not part of the hair shaft itself but is associated with the hair follicle. It secretes sebum, an oily substance that lubricates the hair and skin.