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Similar to Circulation human heart shortened and revised (20)
Circulation human heart shortened and revised
- 1. Circulation Unit 11 – Body Systems
- 2. Circulation Blood travels to every cell in the body – Delivers O2, nutrients, energy – Removes wastes j Capillaries of head and arms Pulmonary arteryAorta Superior vena cava Inferior vena cava Pulmonary veinCapillaries of right lung Capillaries of left lung Capillaries of lower body
- 3. Circulation in Humans j Capillaries of head and arms Pulmonary arteryAorta Superior vena cava Inferior vena cava Pulmonary veinCapillaries of right lung Capillaries of left lung Capillaries of lower body 4 chambered heart Double –loop Pulmonary Circulation: blood is pumped from the right side of the heart to the lungs Systemic Circulation: blood is pumped to the body
- 4. Human Heart Hollow muscular organ Surrounded by a protective sac called pericardium Myocardium - muscle in the heart walls A septum divides the heart in half Each side has 2 chambers – Atrium (upper) receives blood – Ventricles (lower) pump blood OUT of the heart Valves keep blood flowing in the right direction
- 5. Human Heart Mitral (Bicuspid) Valve • Prevents backflow from the left ventricle into the atrium Septum Right Ventricle Tricuspid Valve • Prevents backflow between the right atrium and ventricle Right Atrium Pulmonary Artery • Carries deoxygenated blood from heart to the lungs Pulmonary Valve • Prevents backflow between the right ventricle and pulmonary artery Pulmonary Veins • Carries oxygenated blood from lungs BACK to the heart Aortic Valve • Prevents backflow into the left ventricle from the aorta Left Atrium Left Ventricle Superior Vena Cava • Large vein which brings O2 poor blood from upper body to the right atrium Inferior Vena Cava • Large vein which brings O2 poor blood from upper body to the right atrium Aorta • Brings oxygenated blood from the heart to the rest of the body
- 7. Blood Vessels -Veins Veins have valves Return blood to the heart
- 8. Blood Vessels - Arteries Carry blood Away from the heart Blood is under the highest pressure in the arteries – Thick muscular walls – Elastic Artery disease may lead to heart attack or stroke
- 9. Blood Vessels - Capillaries Smallest vessels, only one cell thick Diffusion occurs between capillaries and all cells Gas exchange
- 10. What is Blood Pressure? Pressure exerted by blood against artery walls Systolic – force when ventricles contract Diastolic – force felt when ventricles relax Normal 120/80
- 11. What is Heartbeat? Controlled by the SA Node or “Pacemaker”
- 12. How is Heartbeat Measured?
- 13. Lymphatic System Collects fluid that leaks from the blood, and returns it to the circulatory system Lymph flows through vessels Lymph nodes trap bacteria
- 14. Lymphatic System Two Organs – Spleen removes old RBCs – Thymus - site where T-cells mature Superior vena cava Lymph nodes Thymus Heart Thoracic duct Spleen Lymph vessels
- 15. Components of Blood 55% Plasma 45% cellular components – Red Blood Cells (RBC) – White Blood Cells (WBC) – Platelets
- 16. Components of Blood What does each component look like? What is the structure? What is the function of each component? (plasma, RBC, WBC, platelets) How does structure determine function? Which cells are the most numerous? What is the scientific name for each cell type?
- 17. Components of Blood Red Blood Cells (Erythrocytes) – Iron containing hemoglobin binds O2 – Disc shape increases surface area – Most numerous cell type White Blood Cells (Leukocytes) – Fight infection – Largest blood cell, least numerous Platelets (Thrombocytes) – Release chemicals to clot blood – Small cellular fragments
- 18. Blood Cells Red Blood Cells White Blood Cells Platelets
- 19. Blood Types Incompatible blood types will result in agglutination (clumping)
- 20. Blood Types A, B, AB, and O OAnti-A & Anti-B NoneO ABA, B, AB and O NoneABAB B and ABO and BAnti-ABB A and ABO and AAnti-BAA Can Donate To… Can Receive Blood From… Antibodies in Plasma Antigens on RBC’s Blood Type