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

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

Which of the following structures is part of the lower respiratory tract?

Oral cavity

Trachea

Nasal cavity

Pharynx

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Verified step by step guidance

Step 1: Understand the division of the respiratory tract into two main parts: the upper respiratory tract and the lower respiratory tract. The upper respiratory tract includes structures such as the nasal cavity, oral cavity, and pharynx, while the lower respiratory tract includes structures such as the trachea, bronchi, and lungs.

Step 2: Review the anatomical location and function of each structure listed in the problem. The nasal cavity and oral cavity are involved in air intake and are part of the upper respiratory tract. The pharynx serves as a passageway for air and food and is also part of the upper respiratory tract.

Step 3: Focus on the trachea. The trachea is a tube-like structure that connects the larynx to the bronchi and serves as a passageway for air to reach the lungs. It is located below the larynx and is part of the lower respiratory tract.

Step 4: Compare the listed structures to determine which one belongs to the lower respiratory tract. Based on anatomical classification, the trachea is the correct answer as it is part of the lower respiratory tract.

Step 5: Conclude that the trachea is the correct answer because it is anatomically classified as part of the lower respiratory tract, while the other structures listed (oral cavity, nasal cavity, and pharynx) are part of the upper respiratory tract.