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Set up Cornell Notes on pg. 75 Topic: 30.1 Circulatory Functions Essential Question(s) :

30.1 Circulatory Functions. 2.1 Atoms, Ions, and Molecules. Set up Cornell Notes on pg. 75 Topic: 30.1 Circulatory Functions Essential Question(s) : On pg. 74 please create a double-bubble map comparing and contrasting pulmonary and systemic circulation. Sponge.

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Set up Cornell Notes on pg. 75 Topic: 30.1 Circulatory Functions Essential Question(s) :

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  1. 30.1 Circulatory Functions 2.1 Atoms, Ions, and Molecules Set up Cornell Notes on pg. 75 • Topic: 30.1 Circulatory Functions • Essential Question(s): • On pg. 74 please create a double-bubble map comparing and contrasting pulmonary and systemic circulation.

  2. Sponge • Think about the muscles in your body: • Do they get tired? • Hurt? • Sore? • Torn? • Now think about your heart. Does it do these things?

  3. The system includes : • heart pumps blood throughout body • arteries move blood away from heart • Oxygen-rich blood • veinsmove blood back to the heart • Oxygen-poor blood • capillaries get blood to and from tissues • *Where gas, water, and nutrient exchange occur Blood Vessels

  4. Standard • 9.a Students know how the complementary activity of major body systems provides cells with oxygen and nutrients and removes toxic waste products such as carbon dioxide.

  5. KEY CONCEPT The heart is a muscular pump that moves the blood through two pathways.

  6. NORMAL HUMAN HEART The tissues and structures of the heart make it an efficient pump. • Cardiac muscle tissue works continuously without tiring.

  7. Regular heart vs. Enlarged Heart

  8. pulmonary valve aortic valve left atrium right atrium mitral valve left ventricle tricuspid septum right ventricle • Valves in each chamber prevent backflow of blood. • The heart has four chambers: two atria, two ventricles. • Muscles squeeze the chambers in a powerful pumping action.

  9. SA node VA node • The heartbeat consists of two contractions. 1) Sinoatrial (SA) node, or pacemaker, stimulates atria to contract LUB 2) Atrioventricular (AV) node stimulates ventricles to contract DUB Lub-dub Lub-dub Lub-dub

  10. Blood flows through the heart in a specific pathway. • 1. oxygen-poor blood enters right atrium • 2. It pumps into the right ventricle, which pumps blood to lungs • 3. oxygen-rich blood from lungs enters left atrium • 4. It pumps into the left ventricle, which pumps blood to body 3 1 4 2

  11. Aorta Right Atrium Left Atrium Oxygen-poor blood Oxygen-rich blood Left Ventricle Right Ventricle

  12. Sponge • Name the four chambers of the heart • Explain the path of the oxygen-poor blood • Explain the path of the oxygen-rich blood • When the oxygen-poor blood enters the lungs what does it drop off and pick up?

  13. Name the four chambers of the heart • Right atrium, right ventricle, left atrium, left ventricle • Explain the path of the oxygen-poor blood • Enters the right atrium from the body, to right ventricle, to the lungs • Explain the path of the oxygen-rich blood • Enters from the lungs into the left atrium, to the left ventricle, and out to the body through the aorta • When the oxygen-poor blood enters the lungs what does it drop off and pick up? • Drops off carbon dioxide and water vapor and picks up oxygen

  14. The heart pumps blood through two main pathways. • Pulmonary circulation occurs between the heart and the lungs. • oxygen-poor blood enters lungs • excess carbon dioxide and waterexpelled (exhale) • blood picks up oxygen (inhale) • oxygen-rich blood returns to heart

  15. Systemic circulation occurs between the heart and the rest of the body. • oxygen-rich blood goes to organs, extremities (arms/legs) • oxygen-poor blood returns to heart

  16. The two pathways help maintain a stable body temperature.

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