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Understanding the Circulatory System: Heart, Blood Vessels, and More

Explore the organ system comprising the heart, blood vessels, and blood, which transports vital substances through the body. Learn about red and white blood cells, platelets, plasma, and the functions of different blood vessels. Gain insight into coronary artery disease, heart attacks, and preventative measures. Written in English.

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Understanding the Circulatory System: Heart, Blood Vessels, and More

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  1. The Circulatory System

  2. Circulatory System • The organ system made of the heart, blood vessels and blood • transports substances through the body

  3. BLOOD • A type of connective tissue • Made up of 4 parts: • Red blood cells • White blood cells • Platelets • plasma

  4. Red Blood Cells • Contains a protein hemoglobin which transports oxygen and carbon dioxide

  5. White Blood Cells • Fight infection!

  6. Platelet • Aids in clotting

  7. Plasma • Protein rich liquid in which blood cells float

  8. Blood

  9. The Heart • Organized into 4 chambers • Pacemaker cells tell the heart to contract and pump blood • Valves in the heart make sure the blood always goes the right way

  10. 3 Types of Blood Vessels Arteries: carries blood away from the heart (more muscular than veins) Veins: carries blood back to the heart (contains valves) Capillaries: a tiny blood vessel- link arteries and veins together

  11. Capillaries allow oxygen to diffuse from blood into cells • Carbon dioxide moves from cells into blood and out through lungs • Other waste goes through the kidney then gets excreted through urine

  12. The circulation of blood • the heart pumps blood to lungs – oxygen goes into blood, carbon dioxide leaves • Blood travels through arteries and capillaries and gives oxygen to cells, wastes are carried away • Blood returns to the heart through veins

  13. Coronary Artery Disease • These are the blood vessels that provide oxygen and nutrients to the heart muscle tissue • These arteries can become blocked with plaque (deposits of fats, cholesterol, calcium, etc) • Build-up can be due to bad heath (smoking), diet, lack of exercise, genetics • An angiogram (fluorescent dye injected into the blood is X-rayed) can detect this and preventative measures can be taken before the disease turns fatal

  14. Heart Attack • When coronary arteries become completely blocked with either a blood clot or plaque • The heart stops pumping and the tissue begins to die • An electrocardiogram (ECG) measures the electrical signals from the heart as it beats – damaged tissue signals are different than healthy signals

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