Table of contents

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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

22. The Respiratory System

Introduction to Lung Physiology

Anatomy & Physiology

22. The Respiratory System

Introduction to Lung Physiology

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Multiple Choice

How do amphibians primarily breathe?

Through lungs and skin

Through gills only

Through spiracles

Through tracheal tubes

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Verified step by step guidance

Understand the respiratory systems of amphibians: Amphibians have a unique respiratory system that allows them to breathe through multiple methods depending on their life stage and environment.

Identify the primary breathing methods: Amphibians primarily breathe through their lungs and skin. This dual method allows them to exchange gases both in water and on land.

Consider the life stages: During the larval stage, many amphibians, like tadpoles, use gills to breathe underwater. As they mature, they develop lungs for breathing air.

Recognize the role of skin: Amphibians have moist skin that facilitates cutaneous respiration, allowing them to absorb oxygen directly from their environment.

Exclude other options: Spiracles and tracheal tubes are not used by amphibians for respiration. Spiracles are openings used by insects, and tracheal tubes are part of the insect respiratory system.