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 germ layer forms the skeleton and most muscles during embryonic development?

Mesoderm

Periderm

Endoderm

Ectoderm

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Verified step by step guidance

Understand the concept of germ layers: Germ layers are the primary layers of cells formed during embryonic development. They differentiate into various tissues and organs in the body. The three germ layers are ectoderm, mesoderm, and endoderm.

Identify the role of the mesoderm: The mesoderm is the middle germ layer. It is responsible for forming structures such as the skeleton, muscles, connective tissues, the circulatory system, and parts of the urogenital system.

Clarify the roles of the other germ layers: The ectoderm forms the outermost layer and gives rise to the skin, nervous system, and sensory organs. The endoderm forms the innermost layer and develops into the lining of the digestive and respiratory tracts, as well as associated organs like the liver and pancreas.

Eliminate incorrect options: Periderm is not a germ layer; it is a temporary layer of skin during development. Ectoderm and endoderm do not form the skeleton or muscles, so they can be ruled out.

Conclude that the mesoderm is the correct answer: Based on its role in forming the skeleton and most muscles, the mesoderm is the germ layer responsible for these structures during embryonic development.