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Do now:

Do now:. Why do we do CPR on someone that appears to be having a heart attack? Do we expect the person to be revived? 1. Ideally, the pumping will start the heart although highly unlikely.

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Do now:

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  1. Do now: • Why do we do CPR on someone that appears to be having a heart attack? • Do we expect the person to be revived? • 1. Ideally, the pumping will start the heart although highly unlikely. • 2. The pumping on the chest mimics the heart pumping and fresh blood circulating to the heart, brain and other vital organs. • Unless a defib. unit arrives on the scene and the person is brought to the hospital in under an hour this person will likely not survive.

  2. CPR • CPR is crucial to maintaining life, but unless defibrillation

  3. Homework • Due Today - 1 page minimum summary of the first readingof Section 33.1 – The Circulatory System. Pages 948-953. Also, the rough draft due June 8th • Due on today also is the rough draft. • Due on Tuesday June 12th - Quiz on Sections 32.2, 33.1 – It will include a diagram on the heart & circulatory system. • Please note - Due on Tuesday June 12th - Re-read & review Section 33.1 – The Circulatory System. Pages 948-953

  4. New Material – Circulatory System • Why do we breath? • Why does the heart pump? • Each time we inhale we are taking in CO2 & O2 (mostly for the O2 ) and expelling excess CO2 . The body needs fresh O2 for the heart & brain. • The technical name for the heart is the myocardium.

  5. The Heart • Atriums – the top cavities • Ventricles: • Bottom cavities

  6. The Heart • Atriums – these are blood collection areas. The Right Atrium collects old blood, once full it dumps into the Right Ventricle. • Right Ventricle will • pump this old • blood to the lungs.

  7. The Heart • Left Atrium receives fresh blood from the lungs. Which then fills and dumps into the Left Ventricle. • The Right Ventricle will • pump blood to the rest • of the body. • This is why the Right • Ventricle is thicker than • the left since it pumps • blood to the whole body.

  8. New Material • The heart and vessels • Label these!

  9. New Material • Veins versus arteries – veins carry deoxygenated blood (lacking O2), except Pulmonary Arteries & Veins

  10. New Material • Blood Flow & circulation – Blood going to the lungs is to exchange • CO2 Gas for O2 Gas. • which will expelled • when exhaling.

  11. New Material • Blood Flow & circulation – Blood Pressure. • For example 120 / 80. • What does that mean?

  12. New Material • More to follow in Tuesday’s class after the Quiz. • Reminder: Go to the paper guidelines • http://science.hyde.wikispaces.net/Biology-Walsh • Please place the chairs on the tables and clean around your desk. • Wait to be dismissed

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