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 tissue is shown in the image, characterized by a single layer of flat cells lining the air sacs of the lungs?

Transitional epithelium

Stratified squamous epithelium

Simple squamous epithelium

Simple cuboidal epithelium

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Verified step by step guidance

Step 1: Understand the characteristics of epithelial tissues. Epithelial tissues are classified based on the number of layers (simple or stratified) and the shape of the cells (squamous, cuboidal, or columnar). Simple epithelium has a single layer of cells, while stratified epithelium has multiple layers.

Step 2: Focus on the description provided in the problem. The tissue is described as a single layer of flat cells lining the air sacs of the lungs. This indicates it is a simple epithelium because it has only one layer of cells.

Step 3: Identify the shape of the cells. Flat cells are characteristic of squamous epithelium. Squamous cells are thin and flat, allowing for efficient gas exchange, which is essential in the lungs.

Step 4: Match the description to the correct type of epithelial tissue. Simple squamous epithelium is specifically adapted for diffusion and filtration, making it ideal for lining structures like the air sacs of the lungs (alveoli).

Step 5: Eliminate the other options. Transitional epithelium is found in areas like the bladder and is specialized for stretching. Stratified squamous epithelium is multilayered and found in areas subject to abrasion, like the skin. Simple cuboidal epithelium consists of cube-shaped cells and is found in glands and kidney tubules, not the lungs.