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

23. The Digestive System

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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1:34 minutes

Problem 2

Textbook Question

More than one choice may apply.
A digestive organ that is not part of the alimentary canal is the
a. Stomach
b. Liver
c. Small intestine
d. Large intestine
e. Pharynx

Verified step by step guidance

Understand the difference between the alimentary canal and accessory organs of the digestive system. The alimentary canal is the continuous tube through which food passes, while accessory organs assist in digestion but are not part of the tube itself.

Identify the organs listed in the question: stomach, liver, small intestine, large intestine, and pharynx. Determine which of these are part of the alimentary canal and which are accessory organs.

Recall that the alimentary canal includes organs directly involved in the passage and processing of food, such as the mouth, pharynx, esophagus, stomach, small intestine, and large intestine.

Recognize that the liver is an accessory organ because it produces bile to aid digestion but does not directly handle food. The other organs listed (stomach, small intestine, large intestine, and pharynx) are part of the alimentary canal.

Conclude that the liver is the digestive organ listed that is not part of the alimentary canal, while the other options are part of the alimentary canal.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Alimentary Canal

The alimentary canal, also known as the gastrointestinal tract, is a continuous tube that runs from the mouth to the anus. It includes organs such as the esophagus, stomach, small intestine, and large intestine, which are directly involved in the digestion and absorption of food. Understanding which organs are part of this canal is crucial for identifying those that are not.

Accessory Digestive Organs

Accessory digestive organs are those that assist in the digestive process but are not part of the alimentary canal. These include the liver, pancreas, and gallbladder, which produce enzymes and bile necessary for digestion. Recognizing these organs helps differentiate them from those that are part of the main digestive pathway.

Function of the Liver

The liver is a vital organ that performs numerous functions, including the production of bile, metabolism of nutrients, and detoxification of harmful substances. It plays a crucial role in digestion by aiding in the emulsification of fats, but it is not part of the alimentary canal itself. Understanding the liver's role helps clarify its classification as an accessory organ.