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 best describes the diaphragm?

A dome-shaped muscle that separates the thoracic and abdominal cavities and plays a key role in breathing

A gland located above the kidneys that produces hormones

A sheet of connective tissue that covers the heart

A cartilage structure that supports the trachea

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Verified step by step guidance

Step 1: Begin by identifying the diaphragm as a structure in the human body. It is a muscle that plays a critical role in respiration and separates two major cavities: the thoracic cavity (containing the lungs and heart) and the abdominal cavity (containing digestive organs).

Step 2: Eliminate the incorrect options by understanding their definitions. For example, the gland above the kidneys refers to the adrenal glands, which produce hormones, and is unrelated to the diaphragm.

Step 3: Recognize that the diaphragm is not a sheet of connective tissue covering the heart. That description refers to the pericardium, which is a protective membrane around the heart.

Step 4: Understand that the diaphragm is not a cartilage structure supporting the trachea. The trachea is supported by C-shaped cartilage rings, which maintain its open structure for air passage.

Step 5: Conclude that the diaphragm is best described as a dome-shaped muscle that separates the thoracic and abdominal cavities and plays a key role in breathing, as it contracts and relaxes to facilitate air movement into and out of the lungs.