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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Multiple Choice

Which of the following is the largest and first compartment of a ruminant stomach?

Abomasum

Omasum

Reticulum

Rumen

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Verified step by step guidance

Step 1: Understand the anatomy of the ruminant stomach. Ruminants, such as cows, sheep, and goats, have a specialized stomach divided into four compartments: the rumen, reticulum, omasum, and abomasum.

Step 2: Learn the function and characteristics of each compartment. The rumen is the largest compartment and serves as the primary site for microbial fermentation of ingested plant material. The reticulum works closely with the rumen to trap larger particles, the omasum absorbs water and nutrients, and the abomasum functions similarly to a monogastric stomach, secreting digestive enzymes.

Step 3: Focus on the size and sequence of the compartments. The rumen is the largest and first compartment, making it the initial site for food storage and fermentation in the digestive process.

Step 4: Compare the rumen to the other compartments. The reticulum is smaller and located near the rumen, the omasum is compact and spherical, and the abomasum is the true stomach but smaller than the rumen.

Step 5: Confirm the correct answer based on the anatomical and functional description. The rumen is the largest and first compartment of the ruminant stomach, as stated in the problem.