20. Lymphatic System

Lymphatic vessels

Lymphatic System

Lymphatic System Overview

 It forms from the merging of collecting vessels from the left upper limb and neck. 

 The thoracic duct drains its lymph at the junction of the left internal jugular and subclavian veins. 

 It forms from the merging of collecting vessels on the right side of the body. 

 It drains the lymph from the right head, neck, shoulder, arm, and upper right chest. 

 It drains the lymph from the entire left side of the body and the right abdomen and leg. 

 Which statement is true of the thoracic duct? 

 It maintains blood volume and, therefore, pressure. 

 As much as 3 liters of lymph must be returned to the blood volume each day. 

 It is the major source for distribution of all hormones. 

 Lymph transport is directly driven by heart contractions. 

 Which statement below describes the lymphatic system’s role in relation to the cardiovascular system? 

 Lymph is more like interstitial fluid than plasma, except for lymph from the digestive organs, where it is a nutrient-rich fluid. 

 Blood plasma and lymph are identical except for their respective locations in the body. 

 Lacteals are located in the intestinal villi and absorb lipids. 

 What lymphatic structure absorbs lipids in the intestine? 

 a system that carries lymph through lymphatic arteries, lymphatic capillaries, and lymphatic veins 

 The lymphatic vessels form a one-way system in which lymph flows only toward the heart. It begins as blind-ended capillaries. 

 a system that collects fluid from arteries and veins and takes it into lymphatic arteries to be pumped back to the blood circulation 

 a one-way system of vessels beginning with blind-ended lymphatic capillaries 

 a system that pumps lymph through lymphatic ventricles to the lymphatic capillaries and through lymph veins back to the atria 

 a system of large vessels designed to fill quickly with lymph as the heart pushes blood through the coronary sinus 

 Which of the following best describes the arrangement of lymphatic vessels? 

 Capillaries pick up lymph and ducts return it to the cardiovascular system. 

 Which sequence best describes the flow of lymph through the lymphatic system? 

Lymphatic Vessels

 anatomical distributions of each vary among individuals 

 Both lymphatic collecting ducts and veins vary in their anatomical distributions among individuals. 

 Both lymphatic collecting ducts and veins have walls made of three layers. 

 Both lymphatic collecting ducts and veins have valves. 

 Which of the following features is NOT common to both lymphatic collecting ducts and veins? 

 Lymphatic capillaries are most closely associated with capillary beds. From the lymphatic capillaries, lymph flows through successively larger and thicker-walled channels. The collecting lymphatic vessels filter lymph through the lymph nodes. Vessels that bring lymph to the nodes are called afferent vessels, and vessels that carry lymph away from the nodes are called efferent vessels. From the lymph nodes, lymph travels to lymphatic trunks and then eventually to lymphatic ducts. From the terminal lymphatic ducts, lymph rejoins the venous blood supply via the subclavian veins. 

 What part of the lymphatic system is most closely associated with capillary beds? 

 Veins do not transport interstitial fluid that leaks from the vascular system back in to the blood. 

 Capillaries do not transport interstitial fluid that leaks from the vascular system back into the blood. 

 Sinusoids do not transport interstitial fluid that leaks from the vascular system back into the blood. 

 Which of the following vessels transport interstitial fluid that leaks from the vascular system back into the blood? 

The Lymphatic System

 Collecting lymphatic vessels have fewer tunics than do veins. 

 The collecting lymphatic vessels have the same three tunics as do veins, but the collecting vessels have thinner walls and more internal valves, and they anastomose more. 

 Collecting lymphatic vessels have thicker walls than do veins. 

 Collecting lymphatic vessels have more internal valves than do veins. 

 Collecting lymphatic vessels do not form branches (anastomoses); veins do form branches. 

 How are collecting lymphatic vessels <i>different</i> from veins? 

 return of excess tissue fluid to the bloodstream 

 Lymphatic vessels have a role in carrying tissue fluid, leaked proteins, and absorbed fats to the blood. They do not deliver nutrients or gases to the tissues; that is the role of blood vessels.  

 transportation of absorbed fat from the intestine to the blood 

 Which of the following is NOT a function of lymphatic vessels? 

 A major function of the lymphatic system is to return interstitial fluid to the cardiovascular system. Approximately 3 liters of interstitial fluid is returned daily. 

 One of the major functions of the lymphatic system is __________. 

 Capillaries collect excess interstitial fluid via pressure-sensitive valves. 

 What lymphatic vessel collects interstitial fluid? 

 From the lymph nodes, lymph travels to lymphatic trunks and then to lymphatic ducts. From each terminal lymphatic duct, lymph rejoins the venous blood supply at the junction of the internal jugular vein and subclavian vein on its own side of the body. 

 All lymph is eventually returned to circulation via the __________. 

Anatomy Review Animation Immune 

 Which of the following lymphatic trunks is unpaired? 

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1. Introduction to A&P

2. Chemistry

3. Cells

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

21. Immune System

22. Respiratory System

23. Digestive System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

28. Pregnancy and Human Development

29. Heredity

undefined - Channels

Lymphoid tissue

Lymphoid Organs and Tissues

Lymph nodes