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

Levels of Organization

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Levels of Organization

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Multiple Choice

Which of the following are examples of levels of organization that make up an organism?

Atoms, molecules, compounds, and mixtures

Cells, tissues, organs, and organ systems

Protons, neutrons, electrons, and quarks

Species, populations, communities, and ecosystems

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Verified step by step guidance

Understand that the levels of organization in biology refer to the hierarchy of complex biological structures and systems that define life using a reductionistic approach.

Recognize that the correct sequence of biological organization from simplest to most complex is: cells, tissues, organs, and organ systems.

Cells are the basic unit of life, tissues are groups of similar cells that perform a specific function, organs are structures composed of different tissues working together, and organ systems are groups of organs that perform complex functions.

Identify that atoms, molecules, compounds, and mixtures are chemical and physical entities, not biological levels of organization.

Note that protons, neutrons, electrons, and quarks are subatomic particles, and species, populations, communities, and ecosystems are ecological levels, not directly related to the biological organization within an organism.