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The Human Heart

The Human Heart. Lubb-Dubb. The Heart. Made of muscle tissue Heart wall is made of cardiac muscle Contains pacemaker Contains nervous tissue responding to stimuli (leading to increase or decrease in heart rate) Protection of heart Ribs, sternum, spine

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The Human Heart

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  1. The Human Heart Lubb-Dubb

  2. The Heart • Made of muscle tissue • Heart wall is made of cardiac muscle • Contains pacemaker • Contains nervous tissue responding to stimuli (leading to increase or decrease in heart rate) • Protection of heart • Ribs, sternum, spine • Contains 4 chambers, separated by septum • Right and left atria • Receiving chambers • Right and left ventricles • Delivery chambers

  3. Double Circulation System

  4. The Human Heart

  5. Path of Blood Through the Human Heart • There are three main systems or “cycles” that involve getting blood through the heart to the other parts of the body and back: • Pulmonary System • Supplies the lungs (poumon = lungs in French) • Low-pressure system • Systemic System • Supplies the body • High-pressure system • Cardiac System • Supplies the heart

  6. Pulmonary System deoxygenated blood oxygenated blood • PULMONARY SYSTEM(supplies lungs) • R atrium • R ventricle • pulmonary arteries* (*only arteries that carry deoxygenated blood) • arteries, arterioles • capillaries • venules, veins • pulmonary veins* (*only veins that carry O2-rich blood) • L atrium

  7. Systemic System deoxygenated blood oxygenated blood • SYSTEMIC SYSTEM (suppies body cells, except heart) • L atrium • L ventricle • aorta • arteries, arterioles • capillaries • venules, veins • superior & inferior vena cava • R atrium • NOTE: BLOOD IS NOW BACK TO WHERE IT “STARTED”.

  8. Cardiac System deoxygenated blood oxygenated blood • CARDIAC SYSTEM (supplies heart) • L ventricle • aorta • coronary arteries • coronary/cardiac veins • R atrium

  9. Cardiac System – Coronary Arteries

  10. Practice!!  • Miss S. will explain everything.

  11. The Sounds of the Heart • Anyone remember what Bill Nye said the sounds the heart makes are?? • “LUBB” • Louder, longer sound • Made by the closing of AV valves and opening of semi-lunar valves • Occurs at the beginning of systole • Ventricles contract, forcing blood out • “DUBB” • Quieter, shorter sound • Made by closing of semi-lunar valves and opening of AV valves • Occurs at the beginning of diastole • Ventricles relax, allowing blood in

  12. Investigation • You will be put into partners to complete the investigation activity on heart sounds. • Answer all questions on the paper provided. • When we are finished (in about 10 minutes), we will take up the answers together. • Miss S. will collect the papers and record the marks.

  13. Hand Back Day  • Quizzes • Soil Erosion Assignments • Marks Showing  • Test  Anatomy  June 14th or June 15th (Monday or Tuesday) • Review will be the day before • When it is will depend on how long the dissection takes

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