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Hook: Interesting Facts Science

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  1. Hook: Interesting Facts Science • There are 97,000km of blood vessels in every human • The aorta, which is largest artery located in the body, is about the diameter of a garden hose • The risk of cardiovascular disease is twice as high in women that snore regularly compared to women who do not snore • The right lung of a human is larger than the left one. This is because of the space and placement of the heart • The average life span of a single red blood cell is 120 days

  2. Hook: Interesting Facts • Canadians eat more Kraft Dinner (Macaroni and Cheese) per capita than any other country in the world • Most lipstick contains fish scales • China has more English speakers than the United States • Vending machines kill more people each year than sharks do • Approximately 75% of human poop is made of water

  3. Lesson 3: The Circulatory System

  4. Agenda • Hook: Fun Facts • Overview of the circulatory system: Arteries, veins, & capillaries • The human heart Labelling • The human heart Blood Flow • What Am I - Activity • Circulatory system labelling • Circulatory system related problems • Circulatory system in other organisms

  5. The Circulatory System • Is composed of three main parts: Heart, blood vessels, andblood. • There are three types of blood vessels: Arteries, Veins, and Capillaries. • A closed system Function • To transport blood, nutrients, waste, and gases (oxygen and carbon dioxide)

  6. Arteries, Veins, & Capillaries • Arteries carry blood away from the heart • Have thick muscular walls (for contraction) • Veins carry blood to the heart • Thin walls • Capillaries bring blood into close contact with tissues in the body (E.g. muscle tissue) • Very thin in diameter

  7. The Human Heart

  8. Blood Movement in the Heart • Deoxygenated blood from the body’s veins enters the right atrium of the heart. • It is then passes a valve and moves into the right ventricle. • From the right ventricle it is pumped to the lungs to receive oxygen and lose carbon dioxide

  9. Blood Movement in the Heart • The oxygen rich blood then flows into the left atrium. • Passing another valve it moves into the left ventricle. • The blood is then pumped to the rest of the body through the aorta and into the arteries. • Oxygen is carried throughout the body.

  10. Summary: Blood Flow in the Heart

  11. Circulatory System Capillaries (head, forelimb) Right side of heart Capillaries ( lungs) Abdominal Organs (Spleen, Stomach, liver) Left side of heart Capillaries (hind limbs)

  12. Review: Blood Flow throughout the Body • Deoxygenated blood from the body enters the right atrium • The deoxygenated blood will then flow from the right ventricle to the lungs • The lungs will exchange the carbon dioxide in the blood for oxygen • The oxygenated blood then enters the left atrium and exits the left ventricle • It then provides oxygen to tissues around the body

  13. Heart Attack • If too much cholesterol is ingested than plaque may build up • When excessive plaque builds up the artery may be clogged. • If the artery is clogged then little oxygen will move to the heart = Heart attack. • If lack of oxygen moves to the brain = Stroke

  14. Blood Flow Summary

  15. Method of Treatment: Angioplasty

  16. Video on Angioplasty

  17. Circulatory System in Other Organisms • Insects have open circulatory systems • Fish have 2 chambered hearts (1 atrium and 1 ventricle) • Amphibians have 3 chambered hearts (2 atria and 1 ventricle). • Some of the oxygenated blood and deoxygenated blood is mixed. • Some does not pass through the lungs

  18. Homework • Read pages 100-103 • Answer questions #1-4 (page 107) • Read Activity 3-3 (p. 101)

  19. Activity 3-3: Changing Your Pulse Rate (p. 101) • Bring in a timer (phone may be permitted only for use as a timer) • Select a partner • Collect data • Record data in chart format (for each partner) • Answer questions • Only one paper will be submitted for each pair

  20. Day 2

  21. What am I? Heart Blood Flow Exercise • Each pair of students will receive a paper with a region of the heart written on it. Task • To describe your region of the heart without giving away its name: • One individual will be responsible for illustrating the region of the heart • The other will be responsible for describing the region of the heart • The class will then have to guess which region of the heart it is

  22. Follow up Activity: Blood Flow Order • Have one student from each pair come to the front and organize in order according to blood flow. • Teacher will begin by organizing the superior and inferior vena cava. • The students will organize the rest

  23. In Class Work/ Homework • Complete in class worksheet • Answer questions #5,6, & 8 (page 106) • Due tomorrow • If time remains read ahead to the respiratory system