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

20. The Lymphatic System

Introduction to the Lymphatic System

Anatomy & Physiology

20. The Lymphatic System

Introduction to the Lymphatic System

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Multiple Choice

Most of the lymph returns to the venous circulation by way of the:

hepatic portal vein

thoracic duct

superior vena cava

right lymphatic duct

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Verified step by step guidance

Step 1: Understand the role of the lymphatic system in returning lymph to the venous circulation. Lymph is a fluid that is collected from tissues and transported through lymphatic vessels to eventually rejoin the bloodstream.

Step 2: Recall the major structures involved in lymphatic drainage. The thoracic duct and the right lymphatic duct are the two primary lymphatic vessels responsible for returning lymph to the venous circulation.

Step 3: Learn the specific areas drained by each duct. The thoracic duct drains lymph from the majority of the body, including the lower limbs, abdomen, left thorax, left upper limb, and left side of the head and neck. The right lymphatic duct drains lymph from the right upper limb, right thorax, and right side of the head and neck.

Step 4: Identify the venous structures where these ducts empty. The thoracic duct empties into the venous circulation at the junction of the left subclavian vein and left internal jugular vein, while the right lymphatic duct empties at the junction of the right subclavian vein and right internal jugular vein.

Step 5: Based on the question, recognize that the thoracic duct is responsible for returning most of the lymph to the venous circulation, as it drains the majority of the body.