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 lists examples of body structures from the simplest to the most complex?

Cell, atom, tissue, organ, molecule

Tissue, organ, molecule, cell, atom

Atom, molecule, cell, tissue, organ

Organ, tissue, cell, molecule, atom

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Verified step by step guidance

Step 1: Understand the hierarchy of structural organization in the human body. The levels of organization progress from the simplest (smallest) to the most complex. These levels are: atom, molecule, cell, tissue, organ, organ system, and organism.

Step 2: Begin with the smallest unit, the atom. Atoms are the basic building blocks of matter and combine to form molecules.

Step 3: Molecules are formed when atoms bond together. Molecules are essential for cellular structures and functions, such as DNA, proteins, and lipids.

Step 4: Cells are the basic unit of life. They are composed of molecules and perform specific functions. For example, muscle cells contract, and nerve cells transmit signals.

Step 5: Tissues are groups of similar cells that work together to perform a specific function. Organs are composed of multiple tissues that work together to carry out complex functions, such as the heart pumping blood.