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Overview of Cardiovascular System

Reading. Klabunde, Cardiovascular Physiology ConceptsChapter 1 (Introduction to the Cardiovascular System). Functions of the Cardiovascular System. Transport essential substances to the tissuesRemove by-products of metabolismRegulation of body temperatureHumoral communication throughout body

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Overview of Cardiovascular System

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    1. Overview of Cardiovascular System

    2. Reading Klabunde, Cardiovascular Physiology Concepts Chapter 1 (Introduction to the Cardiovascular System)

    3. Functions of the Cardiovascular System Transport essential substances to the tissues Remove by-products of metabolism Regulation of body temperature Humoral communication throughout body Adjustments of oxygen and nutrient supply in different physiologic states

    4. Basic Parts of the Circulatory System Pump Has an electrical system for regular running Series of distributing and collecting tubes Extensive system of thin vessels that permit rapid exchange between the tissues and the vascular channels

    6. Description of Circulatory System Heart = 2 pumps RV ? Pulmonary Circulation LV ? Systemic Circulation Valves cause unidirectional flow in the heart

    7. Systemic Circulation

    9. Description of Circulatory System

    11. Continuous Blood Flow Distension of the aorta and its branches during systole Elastic recoil of the large arteries with forward propulsion of blood during ventricular relaxation during diastole Frictional resistance in the arterioles Blood flow is essentially non-pulsatile at the capillary level

    12. Blood Flow Velocity vs. Cross-sectional Area Velocity of blood flow is inversely related to the cross-sectional area of the vascular system Blood flow velocity is very slow in the capillaries (large cross-sectional area) which makes conditions ideal for exchange of diffusible substances

    14. Basic Theory of Circulatory Function The blood flow to each tissue of the body is almost always precisely controlled in relation to the tissue needs The cardiac output is controlled mainly by the sum of all the local tissue flows In general, the arterial pressure is controlled independently of either local blood flow or cardiac output control

    15. THE END

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