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Lymphatic System

Lymphatic System. Do Now. Please draw a Venn Diagram. One circle should be labeled ‘Veins’ the other circle should be labeled ‘lymphatic vessels’ Compare and contrast. Homework Due Today. Questions on page 961, 1-3

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Lymphatic System

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  1. Lymphatic System

  2. Do Now • Please draw a Venn Diagram. One circle should be labeled ‘Veins’ the other circle should be labeled ‘lymphatic vessels’ • Compare and contrast.

  3. Homework Due Today • Questions on page 961, 1-3 • List the main functions of plasma, red blood cell, white blood cells and platelets. • Hemophilia is a genetic disorder that results from a defective protein in the clotting pathway. What do you think happens to a person with hemophilia who has a minor cut? • Describe the role of the lymphatic system • How are the functions of veins and the lymphatic vessels similar? How are they different? (Venn Diagram) • What are the risk factors for the three common diseases of the circulatory system? • Why do you think atherosclerosis may lead to hypotension?

  4. Answers • Plasma contains dissolved gases and salts; RBCs carry oxygen; WBCs fight infection; platelets clot blood • Hemophiliacs would bleed uncontrollably • Collects lymph and returns it to the circulatory system, removes microorganisms from the blood, and helps absorb fats and fat soluble vitamins from the digestive tract • Venn Diagram • High fat diet, lack of exercise, being overweight, smoking, having diabetes, age, family history, gender • The heart exerts more pressure to push blood through stiff veins, leading to hypertension

  5. Also Due Today… • Chapter 33.2 Worksheet • Lab Questions Handout

  6. Homework for Tomorrow • COME TO CLASS TOMORROW ON TIME • On time – 10/10 homework grade • Late – 0/10 homework grade

  7. Review • Plasma • 90% water • 10% dissolved gases, salts, nutrients, enzymes, hormones, etc. • Helps control body temperature • Albumin, globulins, and fibrinogen

  8. Review • Red Blood Cells • Most numerous cells in blood • Transport oxygen • Get their color from iron in hemoglobin • Binds oxygen in the lungs • Produced by cells in red bone marrow • Circulate for average of 120 days

  9. Review • White Blood Cells • Also called, leukocytes • Guard against infection • Increased levels signify a fight against serious infection • Outnumbered by RBCs 1000 to 1 • Can live for years

  10. Review • Platelets • Plasma proteins and cell fragments • Assist with the clotting of blood

  11. Lymphatic System • Network of vessels, nodes and organs that collect lymph that leaves capillaries, checks for microorganisms, and returns it to the circulatory system • There is no pump; lymph is moved via pressure created from skeletal muscles • When injury or disease blocks lymph vessels, lymph can collect in tissues, causing swelling

  12. Lymphatic System • About 500-600 lymph nodes in you body • Under jaw • Armpits • Groin

  13. Organs of the Lymphatic System • Thymus – located beneath the sternum • Matures lymphocytes • A type of white blood cell, helps with immune system functions • Spleen – Upper right quadrant • Filters blood of microorganisms and other loose debris

  14. Circulatory System Disease • Heart Disease • Stroke • High Blood Pressure • Heart disease is the leading killer in the United States

  15. Heart Disease Facts (CDC) • 600,000 people die of heart disease each year in the US • 1 in 4 • Leading cause of death in both men and women • Every year, 935,000 Americans have a heart attack • 610,000 of those are ‘First timers’

  16. Heart Disease Facts (CDC)

  17. Risk Factors of Heart Disease

  18. Cholesterol • Lipid (fat) that is part of animal cell membranes • Synthesizes hormones, bile and vitamin D • Vitamin D – cell growth and immune function • Cholesterol is in HDL and LDL • LDL – Bad cholesterol • Becomes a part of plaque • HDL – Good Cholesterol • Transports cholesterol from tissues and arteries to the liver for removal

  19. HDL/LDL • Cholesterol should be between 100 – 200 mg / dL • LDL – less than 100 mg/dL • HDL • Men – greater than 40 mg/dL • Women – greater than 50 mg/dL

  20. PREVENTION • It is much easier to prevent heart disease than cure it • Starts when you’re young • Includes • Balanced diet • Regular Exercise • Not smoking • Exercise strengthens the heart and helps it work more efficiently

  21. Homework for Tomorrow • COME TO CLASS TOMORROW ON TIME • On time – 10/10 homework grade • Late – 0/10 homework grade

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