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Understanding the Human Circulatory System: Heart, Blood Vessels & Functions

Explore the structures and functions of the circulatory system, including the heart, blood vessels, and blood cells. Learn about the different types of vessels, the role of blood cells, and how the heart functions to pump oxygenated blood throughout the body.

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Understanding the Human Circulatory System: Heart, Blood Vessels & Functions

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  1. The Circulatory System Structures? Types of Blood Vessels? Purpose of Blood Cells...

  2. Septum left or right atrium right or left ventricle valve (4x) pulmonary vein pulmonary arteries aorta Superior Vena Cava Inferior Vena Cava Structure of the Human Heart - ChoicesDarker blood vessel have no oxygen….

  3. Septum - 8 left atrium - 3 right atrium - 12 right ventricle - 9 left ventricle - 7 valves (4x) - 6, 5, 11 pulmonary vein(2x) - 4, 13 pulmonary arteries(2x) - 14, 2 aorta - 1 Superior Vena Cava 15 Inferior Vena Cava - 10 Structure of the Human Heart - ChoicesDarker blood vessel have no oxygen….

  4. Away from heart Heart is used to pump the blood through the body Thick-walled Narrow Towards heart Muscles of legs and arms pump the blood through the body (valves) low pressure of thoracic cavity thin-walled wide slow Arteries vs. Veins

  5. One-way vales are present in veins.

  6. 37-1

  7. Plasma • Mostly water (90%) • 10% that remains…. • Salts • Sugars • Plasma proteins • Serum albumin: regulates osmotic pressure • Globulins: help with immune system • Fibrinogen: helps with blood clotting

  8. Blood Cells • Red • White • Platelets

  9. Red Blood Cells • Carry oxygen • Hemoglobin • Lack nucleus

  10. White Blood Cells(leucocytes) Produced in bone marrow • 20 different types: e.g. • Macrophages: engulf bacteria • Lymphocytes:produce antibodies to fight disease

  11. Platelets • clotting

  12. Lymphatic System • A one-way system that brings excess tissue fluid back to the heart. • Lymph nodes sample this returning tissue for antigens (infections).

  13. The Circulatory System Structures? Types of Blood Vessels? Purpose of Blood Cells...

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