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Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology7Circulation and Respiration Section: The Lymphatic System ______ 1. A group of organs whose main function is to collect extra fluid from cells and return it to the blood is the a. cardiovascular system.c. circulatory system. b. lymphatic system.d. atria and ventricles. 2. The lymphatic system helps your body to fight . VESSELS OF THE LYMPHATIC SYSTEM 3. The smallest lymph vessels are called . 4. Why are some particles NOT absorbed by blood vessels? 5. Fluid and particles collected by lymphatic vessels and nodes are called . 6. Where does lymph drain? OTHER PARTS OF THE LYMPHATIC SYSTEM ______ 7. Where are most red and white blood cells produced? a. bone marrow b. lymph vessels c. blood vessels d. lymph nodes ______ 8. Special white blood cells that fight pathogens are called a. RBCs. b. nodes. c. lymphocytes. d. bean cells. ______ 9. Small oval masses of lymphatic tissue found in lymphatic vessels are called a. lymph nodes. c. lymph fluids. b. lymph capillaries. d. killer cells. NameClassDate Directed Reading A Skills Worksheet

Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology8Circulation and Respiration NameClassDate Directed Reading A continued ______10. What do lymph nodes do? a. remove nodes b. create new lymph c. create new blood cells d. remove pathogens and dead cells from lymph ______11. What do killer T cells do? a. produce antibodies b. destroy pathogens c. destroy lymphocytes d. produce antigens ______12. What do B cells do? a. produce antibodies b. destroy pathogens c. destroy lymphocytes d. produce antigens ______13. The main gland of the lymphatic system is the a. bone marrow. b. lymph. c. thymus. d. lymph node. 14. The thymus gland produces that are ready to fight infection. 15. The largest organ in the lymphatic system is the . 16. List the two important functions of the spleen. 17. List four things the spleen does with red blood cells. 18. The lymphatic tissues at the back of the mouth are called . 19. Tonsils help defend the body against .

1 answer

Sure! Here are the answers to the questions based on the lymphatic system:

  1. b. lymphatic system
  2. pathogens
  3. lymph capillaries
  4. Some particles are too large to be absorbed by blood vessels and are instead absorbed by lymphatic vessels.
  5. lymph
  6. Lymph drains into the bloodstream, specifically into the subclavian veins.
  7. a. bone marrow
  8. c. lymphocytes
  9. a. lymph nodes
  10. d. remove pathogens and dead cells from lymph
  11. b. destroy pathogens
  12. a. produce antibodies
  13. c. thymus
  14. T cells
  15. spleen
  16. The two important functions of the spleen are filtering blood and helping produce white blood cells that fight infection.
  17. The spleen removes old or damaged red blood cells, recycles iron, stores red blood cells, and produces lymphocytes.
  18. Tonsils
  19. bacteria and other pathogens

If you have any more questions or need further assistance, feel free to ask!