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

4. Tissues & Histology

Introduction to Epithelial Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Epithelial Tissue

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Multiple Choice

Which structural feature is commonly found in epithelial tissues that provide protection?

Abundant blood vessels

Multiple layers of cells

Large extracellular matrix

Presence of cilia

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Verified step by step guidance

Understand the function of epithelial tissues: Epithelial tissues serve as protective barriers, covering surfaces and lining cavities in the body. Their structure is closely related to their function.

Analyze the structural features listed in the problem: Evaluate each option to determine which feature contributes to the protective role of epithelial tissues.

Option 1: 'Abundant blood vessels' - Epithelial tissues are avascular, meaning they lack blood vessels. Nutrients and waste exchange occur through diffusion from underlying connective tissues. This feature does not contribute to protection.

Option 2: 'Multiple layers of cells' - Multiple layers, known as stratified epithelium, provide enhanced protection against physical and chemical damage. This is a key feature of protective epithelial tissues, such as the skin's epidermis.

Option 3: 'Large extracellular matrix' and 'Presence of cilia' - Epithelial tissues have minimal extracellular matrix, as cells are tightly packed. Cilia are specialized structures for movement of substances, not directly related to protection. Therefore, these features are less relevant to the protective function.