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Cardiovascular System Cardiovascular System

Cardiovascular System. The Cardiovascular System Functions of the Cardiovascular System: Cardiovascular System Components:

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  • Cardiovascular System

  • The Cardiovascular SystemFunctions of the Cardiovascular System:

    Cardiovascular System Components:

  • Properties of BloodTwo main components: 1. Plasma

    2. Blood cellsRed blood cells (erythrocytes)

    White blood cells (leukocytes)

    PlateletsPlasma 55% 90% water 7% plasma proteins 3% other (acids, salts)Formed elements 45%>99% red blood cells

  • The Heart

  • The Internal Anatomy of the Heart

  • Path of Blood Through the Heart

    AortaSuperior vena cavaRight pulmonary arteryAortic semilunar valveRight pulmonary veinsRight atriumPulmonary semilunar valveTricuspid valveRight ventricleInferior vena cavaLeft pulmonary arteryLeft pulmonary veinsLeft atriumBicuspid (mitral) valveLeft ventricle Chordae tendinaePapillary musclesInterventricular septumChordae tendinaePapillary musclesThoracic aorta (descending)

  • Coronary Vessels Anterior ViewSuperior vena cavaBranches of right pulmonary veinsRight pulmonary veinsRight atriumRight coronary arterySmall cardiac veinRight ventricleInferior vena cavaAortaLeft pulmonary arteryBranches of left pulmonary arteryPulmonary trunkLeft pulmonary veinsLeft atriumAnterior interventricular branch of left coronary arteryGreat cardiac veinLeft ventricleThoracic aorta (descending)

  • Excitation of the HeartCardiac Muscle

    Sympathetic Influence (tachycardia)

    Parasympathetic Influence (bradycardia)

  • The Heart Electrical Conduction SystemSinoatrial (SA) nodeBundle of His (AV bundle) Atrioventricular (AV) nodeRight and left bundle branchesPurkinje fibres

  • The Electrical Activity of the HeartElectrocardiogram (ECG) Graphical representation of electrical sequence of events occurring with each contraction of the heart

    P wave:

    QRS complex:

    T wave:

  • Blood PressureBlood Pressure

    Normal BP = 120 / 80 mmHgHypertensive BP = 140 / 90 mmHg

  • Blood Flow Distribution

  • Cardiac OutputCardiac Output (Q) is the primary indicator of the functional capacity of the circulatory system to meet the demands of physical activity. On average a person pumps about 5 litres of blood per minute from their left ventricle at rest. The difference between a trained and untrained person is how this is accomplished.Q = Trained 50bts/min * 100 ml/btUntrained 71bts/min * 70 ml/bt

    Benefits of Being A Trained Athlete