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Circulatory System

Circulatory System. Function – Transport oxygen and remove waste from tissues. Blood Vessels. Arteries – carry blood from heart to tissues, carry oxygen rich blood. Blood Vessels. Veins – bring blood back to the heart, many contain valves to ensure flow in one direction. Blood Vessels.

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Circulatory System

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  1. Circulatory System • Function – Transport oxygen and remove waste from tissues

  2. Blood Vessels • Arteries – carry blood from heart to tissues, carry oxygen rich blood

  3. Blood Vessels • Veins – bring blood back to the heart, many contain valves to ensure flow in one direction

  4. Blood Vessels • Capillaries – smallest blood vessels

  5. Capillaries • Exchange of oxygen, CO2 and nutrients

  6. Heart • Pump blood through the body, contracts 72 times/minute

  7. Heart • Atria – receive oxygen poor blood from body and oxygen rich blood from the lungs

  8. Heart • Ventricles – pumps blood to the lungs and to the body

  9. Valves of the Heart • Tricuspid valve – between right atrium and right ventricle

  10. Valves of the Heart • Mitral valve – between left atrium and left ventricle

  11. Blood Flow through the Heart • Pulmonary Circulation – blood that goes and returns to the lungs

  12. Blood Flow through the Heart • Systemic Circulation – blood that goes to the body systems

  13. Control of Heart Beat • SA node (pacemaker) – makes muscle fibers of the atria contract

  14. Control of Heart Beat • AV node – produces an impulse for the ventricles to contract

  15. Composition of Blood

  16. Composition of Blood • Plasma – 90% water, 10% gases, salts, nutrients, enzymes, hormones, waste products, proteins, cholesterol, and other compounds

  17. Composition of Blood • Red Blood Cells (erythrocytes) – transport oxygen, contain hemoglobin (iron rich protein that gives color to blood

  18. Composition of Blood • RBC’s - produced in bone marrow, do not have nucleus, live about 120 days

  19. Composition of Blood • RBC’s – destroyed in the liver and spleen

  20. Composition of Blood • White Blood Cells – guard against infections, attack bacteria

  21. White Blood Cells • Have a nucleus and can live for years

  22. Composition of Blood • Platelets – cell fragments made in bone marrow

  23. Platelets Stop bleeding together with clotting factors

  24. Risk Factors for Hypertension

  25. Normal Blood Pressure Ranges • This is a general view of the average blood pressure reading for the age range in question. • Age 15-19 - 117/77 mm/Hg • Age 20-24 - 120/79 mm/Hg • Age 25-29 - 121/80 mm/Hg • Age 30-34 - 122/81 mm/Hg • Age 35-39 - 123/82 mm/Hg • Age 40-44 - 125/83 mm/Hg • Age 45-49 - 127/84 mm/Hg • Age 50-54 - 129/85 mm/Hg • Age 55-59 - 131/86 mm/Hg • Age 60-64 - 134/87 mm/Hg

  26. Risk Factors of Hypertension - Race

  27. Risk Factors of Hypertension • Family History • Overweight

  28. Risk Factors of Hypertension • Not being physically active • Using Tobacco

  29. Risk Factors of Hypertension • Too much salt • Too little potassium

  30. Risk Factors of Hypertension • Too little Vit. D • Too much alcohol

  31. Risk Factors of Hypertension • Stress • Certain chronic conditions

  32. Respiratory System • Pick up oxygen from lungs and release CO2

  33. Structure • Nose – filter, moistens and warms air

  34. Structures • Pharynx – cavity at the back of the mouth that is the passage of air and food

  35. Structures • Trachea – brings oxygen to the lungs

  36. Structures • Larynx – contain the vocal cords

  37. Lungs • Surrounded by the pleura membrane

  38. Lungs • Bronchi – two large tubes that enter the lungs

  39. Lungs • Bronchioles – branches of the bronchi

  40. Lungs • Alveoli – tiny air sacs at the end of the bronchioles; gas exchange takes place here

  41. Identify the parts

  42. Function of Breathing - Inhalation

  43. Function of Breathing - Exhalation

  44. Smoking • Damages structures of respiratory system

  45. Diseases caused by Smoking • Bronchitis – bronchi are inflames and blocked by mucous

  46. Diseases caused by Smoking • Emphysema – loss of elasticity and eventual break down of lung tissue; no cure

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