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THE CIRCULATORY SYSTEM

The circulatory system is vital for transporting nutrients, oxygen, and waste throughout the body via blood vessels. Comprising the heart, an intricate network of blood vessels, and blood itself, it ensures that your body's cells receive what they need to function effectively. The heart has four chambers: two atriums and two ventricles. Blood circulation occurs in three ways: coronary (supplying the heart), pulmonary (to and from the lungs), and systemic (to the rest of the body). Valves in veins maintain unidirectional blood flow, preventing backflow and ensuring efficiency.

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THE CIRCULATORY SYSTEM

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  1. THE CIRCULATORY SYSTEM Why is it important? Your body’s cells depend on the blood vessels to bring nutrients & remove wastes.

  2. How Materials move through the body: • Just like water moving through pipes, materials are moved throughout the body by the cardiovascular system. • Cardiovascular system includes your heart, kilometers of blood vessels, and blood.

  3. THE HEART: • Your heart is an organ made up of __________ muscle tissue. • Four Compartments called chambers • Two upper chambers are called atriums • Two lower chambers are called right and left ventricles

  4. HEART DIAGRAM

  5. CORONARY CIRCULATION: • Coronary circulation: the flow of blood to and from the tissues of the heart. • When coronary circulation is blocked, oxygen and nutrients cannot reach the cells of the heart and a heart attack occurs!

  6. Pulmonary circulation • Pulmonary circulation: the flow of blood through the heart to the lungs and back.

  7. Systemic Circulation: • Systemic circulation: the flow of blood to the rest of the body (NOT the lungs or heart)

  8. BLOOD VESSELS: • Carry blood to every part of your body • Blood moves oxygen and nutrients to cells. • Blood moves waste and carbon dioxide away from cells.

  9. Cross Section of a Vein

  10. Blood flow in a vein: • Blood only flows one direction in each vein. • A valve prevents blood from flowing in the wrong direction through a vein.

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