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

1. Introduction to Anatomy & Physiology

Organization of the Body: Thoracic Cavity

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Organization of the Body: Thoracic Cavity

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Multiple Choice

A bullet enters the left lung and collapses it. Which cavity has been entered?

Pleural cavity

Abdominal cavity

Cranial cavity

Pericardial cavity

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location of the injury. The problem states that the bullet enters the left lung, which is part of the thoracic cavity.

Step 2: Recall that the lungs are surrounded by a specific cavity called the pleural cavity. This cavity is a thin space between the two layers of the pleura (the visceral pleura and the parietal pleura) that encase the lungs.

Step 3: Understand the function of the pleural cavity. It contains a small amount of fluid that reduces friction during breathing and helps maintain lung expansion.

Step 4: Eliminate the other options based on their anatomical locations and functions: The abdominal cavity houses organs like the stomach and intestines, the cranial cavity contains the brain, and the pericardial cavity surrounds the heart.

Step 5: Conclude that the cavity entered by the bullet is the pleural cavity, as it directly surrounds the lungs and is affected when the lung collapses.