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

About how many cells constitute the body of an average adult human?

Nearly 1 quadrillion

Roughly 100 billion

About 1 million

Approximately 37 trillion

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Verified step by step guidance

Step 1: Understand the context of the question. The problem is asking for the approximate number of cells in the human body, which is a fundamental concept in Anatomy & Physiology related to cellular biology.

Step 2: Recall that the human body is composed of trillions of cells, which vary in type and function, including muscle cells, nerve cells, blood cells, and epithelial cells. These cells work together to maintain homeostasis and perform essential functions.

Step 3: Recognize that the number of cells in the human body is an approximation based on scientific studies. Researchers estimate the total number of cells by considering the average size and density of different cell types and the overall mass of the human body.

Step 4: Eliminate the incorrect options by comparing them to the scientifically accepted estimate. For example, 1 quadrillion is far too high, 100 billion is too low, and 1 million is extremely low. The correct estimate is approximately 37 trillion cells.

Step 5: Conclude that the human body contains approximately 37 trillion cells, which highlights the complexity and intricacy of human anatomy and physiology.