Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 39m
3. Energy & Cell Processes10h 8m
4. Tissues & Histology10h 3m
5. Integumentary System2h 28m
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 System3h 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

Given the following 5 levels of organization, which represents the correct hierarchy from smallest to largest?

A) TissueB) OrganC) MoleculeD) CellE) Organism

A, D, C, E, B.

B, E, D, A, C.

C, D, A, B, E.

C, A, B, D, E.

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Verified step by step guidance

Begin by understanding the concept of biological organization, which is a hierarchy of complex biological structures and systems that define life using a reductionistic approach.

Identify the smallest unit in the hierarchy. In this case, 'Molecule' is the smallest level of organization, as molecules are the chemical building blocks of cells.

Next, recognize that 'Cell' is the next level of organization. Cells are the basic structural and functional units of life, composed of molecules.

Following cells, 'Tissue' is the next level. Tissues are groups of similar cells that perform a specific function.

After tissues, 'Organ' is the next level. Organs are made up of tissues that work together to perform specific activities. Finally, 'Organism' is the largest level, representing a complete living entity composed of organ systems.