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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

4. Tissues & Histology

Introduction to Tissues & Histology

Anatomy & Physiology

4. Tissues & Histology

Introduction to Tissues & Histology

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Multiple Choice

In which layer of the gastrointestinal tract is the muscularis mucosae found?

Mucosa

Submucosa

Serosa

Muscularis externa

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Understand the structure of the gastrointestinal tract, which consists of four main layers: mucosa, submucosa, muscularis externa, and serosa.

The mucosa is the innermost layer and is responsible for secretion and absorption. It consists of three sub-layers: the epithelium, the lamina propria, and the muscularis mucosae.

The muscularis mucosae is a thin layer of smooth muscle found within the mucosa layer. Its function is to help with the movement of the mucosal surface.

The submucosa is the layer just outside the mucosa and contains blood vessels, nerves, and glands, but does not include the muscularis mucosae.

The muscularis externa and serosa are outer layers of the gastrointestinal tract, with the muscularis externa responsible for peristalsis and the serosa being the outermost protective layer.