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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 lists levels of human structure from the most complex to the simplest?

Tissue, organ, organ system, organism, cell, organelle

Cell, tissue, organ, organ system, organism, organelle

Organism, organ system, organ, tissue, cell, organelle

Organelle, cell, tissue, organ, organ system, organism

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Verified step by step guidance

Begin by understanding the hierarchical organization of the human body, which is structured from the most complex to the simplest levels.

The most complex level is the organism, which represents the entire living being, capable of independent existence and functioning.

Next is the organ system, which consists of groups of organs that work together to perform complex functions necessary for the organism's survival.

Following the organ system is the organ level, where individual organs are composed of multiple tissues working together to perform specific functions.

The tissue level comes next, consisting of groups of similar cells that perform a common function.

The cell level is the basic unit of life, where each cell carries out essential life processes.

Finally, the simplest level is the organelle, which are specialized structures within cells that perform distinct tasks necessary for cellular function.