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CIRCULATORY SYSTEM

Understand the crucial functions of blood in the circulatory system, including transport, healing, immune response, and components like plasma, red and white blood cells, platelets. Explore the roles of arteries, veins, and capillaries. Utilize microscopy in learning and engage in related activities.

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CIRCULATORY SYSTEM

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  1. CIRCULATORY SYSTEM BLOOD

  2. Functions of Blood • Transport • O2, glucose, amino acidsto cells • CO2 and urea from cells to lungs and kidneys • Hormone messages from endocrine gland to target

  3. Functions of Blood • Wound Healing • Platelets and proteins (ex. fibrinogenfibrin) • http://www.youtube.com/watch?v=--bZUeb83uU

  4. Functions of Blood • Heating and Cooling • Vasoconstriction conserves heat to core • Vasodilation dissipates heat at the skin surface

  5. Functions of Blood • Immune System • Bacteria • Fungi • Viruses • Foreign tissue rejection

  6. Components of Blood • Plasma • Straw coloured • Water concentration varies (hydration level) • Makes up 55% of blood volume • Dissolved O2, CO2

  7. Components of Blood • Red Blood Cells (erythrocytes) • Made in bone marrow • Squished spheres • No nucleus • Filled with hemoglobin which binds with O2

  8. Components of Blood • White Blood Cells (leukocytes) • Produced in bone marrow • Mature in thymus • Have a nucleus • Macrophages engulf by phagocytosis • Granulocytes & Agranulocytes • http://www.youtube.com/watch?feature=player_detailpage&v=PXUNEJkjQt4

  9. Components of Blood • Platelets (thrombocytes) • Cell fragments • Stick to wounds in the blood vessels to initiate clot

  10. Try This! Computer • Activity D5 – Quick Lab: Blood Components • http://media.pearsoncmg.com/intl/pec/school/synapse/biologysource/biology11/shell/resource.php?resource=ACT_ch11_D5_blood.htm

  11. Microscopes • Examining Blood Cells Microscope Activity

  12. D6 Case Study • Blood Doping???

  13. CIRCULATORY SYSTEM BLOOD VESSELS

  14. Blood Vessels • Arteries carry blood away from the heart • Veins carry blood to the heart • Capillaries form a network between arteries and veins to distribute materials to cells and collect waste.

  15. Arteries • Thick muscular walls • Strong connective tissue • Round diameter • No valves • High pressure

  16. Veins • Some muscle • Some connective tissue, thicker layer than muscle • Thin walls • Irregular diameter • Low pressure • Valves prevent backflow

  17. Capillaries • No muscle layer or connective tissue • Walls one cell thick • Medium to low pressure

  18. Microscope • Using the microscope draw an artery & vein!!

  19. Homework • Pg. 302 #1~3 • Pg. 304 #1,2 • Pg. 306 # 1~3 • Pg. 308 #1~3 • Pg. 309 #2,3,5,6,13,14,16,17

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