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 type of epithelial cell is most commonly found lining the alveoli of the lungs?

Stratified squamous epithelium

Transitional epithelium

Simple squamous epithelium

Simple cuboidal epithelium

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Verified step by step guidance

Understand the function of the alveoli in the lungs: The alveoli are tiny air sacs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be expelled. This requires a thin barrier to facilitate efficient diffusion.

Review the characteristics of epithelial tissue types: Simple squamous epithelium consists of a single layer of flat cells, which is ideal for diffusion and filtration due to its thin structure. Other types, such as stratified squamous epithelium, are thicker and designed for protection, not gas exchange.

Eliminate incorrect options: Stratified squamous epithelium is found in areas subject to abrasion, such as the skin or esophagus. Transitional epithelium is specialized for stretching, as seen in the bladder. Simple cuboidal epithelium is involved in secretion and absorption, typically found in glands or kidney tubules.

Identify the correct epithelial type: Simple squamous epithelium is the most suitable for lining the alveoli because its thin structure allows for efficient gas exchange between the air in the alveoli and the blood in surrounding capillaries.

Conclude the reasoning: The correct answer is simple squamous epithelium, as it aligns with the functional requirements of the alveoli for gas exchange.