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Circulatory System

Learn about how the circulatory system functions to transport nutrients, hormones, and gases, while getting rid of wastes. Explore the roles of the cardiovascular and lymphatic systems in maintaining body temperature. Understand circulation patterns, heart structures, blood pressure, and types, functions of blood cells. Discover the importance of proper blood flow and the structure of a heartbeat in this comprehensive guide.

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Circulatory System

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Presentation Transcript

  1. Circulatory System Main Functions: 1. Transports nutrients, hormones, & gases 2. Get rid of wastes 3. Helps maintain a constant body temperature

  2. Two Systems make up the Circulatory System: 1. Cardiovascular system: the blood, heart, & blood vessels. 2. Lymphatic system: the lymph, lymph nodes, & lymph vessels.

  3. Cardiovascular System Function: the heart pumps oxygen rich blood throughout the body and returns oxygen poor blood to the lungs.

  4. Lymphatic System Function: returns fluids (lymph)that have collected in the tissues to the bloodstream. Lymph nodes (mini filters) store lymphocytes.

  5. Circulation Pattern & Heart Structures -Flow -Valves

  6. Heartbeat Control Sinoatrial Node (SA Node) located in the right atrium. “pacemaker” Atrioventricular Node (AV Node) located in the upper septum.

  7. Blood Pressure: -systolicpressure- when the ventricles contract -diastolicpressure- when the ventricles are relaxed Pulse: Pressure waves in arteries from contraction of the left ventricle Hypertension- high blood pressure!

  8. Blood Vessels Aorta Arteries Arterioles

  9. Capillaries -Microscopic blood vessels. -Walls are one celled thick -Blood cells move through in single file line. -Capillary walls enable nutrients and gases to diffuse easily between blood cells and surrounding tissue cells.

  10. Veins Vena Cava Veins Venules -Veins unlike arteries have valves.

  11. Patterns of Circulation Pulmonary Circulation Systemic Circulation Coronary Circulation Hepatic Portal Circulation Renal Circulation

  12. Flow of Blood

  13. Blood (Ch. 46.2) Plasma- liquid part of the blood, mostly water. Carries nourishment for the cells. Red Blood Cells (erthrocytes)- transport oxygen. Formed in the red marrow of cells. -Hemoglobin- transport oxygen and carbon dioxide. -no nuclei -life span of 120-130 days

  14. White Blood Cells (leukocytes)- help defend the body against disease. -formed in the red marrow, lymph nodes, and spleen. -larger than RBC’s -can live many years

  15. Platelets- help form blood clots. -Fibrin (protein) is produced that forms a sticky web, forming a clot. Blood Types- A, B, O, AB • Antigens- protein or carbohydrate that signals the body that something foreign has entered it. • Rhfactor- antigen present on the surface of RBC’s. Majority of humans are Rh +.

  16. Structure of a Heartbeat

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