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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

1. Introduction to Anatomy & Physiology

Levels of Organization

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Levels of Organization

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Multiple Choice

Which of the following correctly lists the levels of organization in the human body from simplest to most complex?

Cell, Tissue, Organ, Organ System, Organism

Organism, Organ System, Organ, Tissue, Cell

Tissue, Cell, Organ, Organ System, Organism

Organ System, Organ, Tissue, Cell, Organism

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Verified step by step guidance

Understand that the levels of organization in the human body describe how biological structures are arranged from the simplest to the most complex.

Begin with the simplest level, which is the 'Cell'. Cells are the basic structural and functional units of life.

Next, recognize that 'Tissues' are groups of similar cells that work together to perform a specific function.

Following tissues, 'Organs' are structures composed of two or more tissue types that work together to perform specific, complex functions.

After organs, 'Organ Systems' consist of different organs that work closely together to accomplish a common purpose.

Finally, the most complex level is the 'Organism', which is a living being that has a cellular structure and can independently perform all physiologic functions necessary for life.