lec 7 cardiovascular1.pptx

lec 7 cardiovascular1.pptx - 6/11/11 1 Cardiovascular (CV)...

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Unformatted text preview: 6/11/11 1 Cardiovascular (CV) Introduction to the CV system Overall design of the CV system Pressure, f ow and resistance The heart as the CV pump Anatomy and cardiac muscle Cardiac cycle (electrical / mechanical ) The cardiac output 10 The goal of these lectures is to discuss basic physiology of the cardiovascular system (heart, vessels, blood pressure, control, hemostasis). This F rst lecture will introduce the cardiovascular (CV) topic and discuss the heart as a pump. The sections for this lecture are: Life is a series of chemical reactions occurring in compartmentalized environments. The main purpose of life is to keep itself alive Physiology, the study of how life works, is based on the simultaneous occurrence of the following three concepts: levels of organization structure / function relationship homeostatic regulation neural CV center heart lung periphery cardio + cardio - vasoconstriction PCO2 PO2 pH Pa extrinsic intrinsic (local control) (local control) baroreceptor mechanism (e.g. carotid sinus) chemo & baroreceptors inputs output where we would like to be at the end of the cardiovascular and respiratory sections 6/11/11 2 Introduction, this CV lecture Overall design of the CV system Pressure, f ow and resistance The heart as pump, this CV lecture Anatomy and cardiac muscle Cardiac cycle's electrical and mechanical events The cardiac output Vessels as tubes, next CV lecture Arteries and arterioles in general Capillaries and veins The lymphatic system Blood pressure regulation, next CV lecture Arterial and venous pressure Blood volume, arterial pressure and baroreceptors Other CV re f exes and responses CV patterns in health / disease, last CV lecture Hemorrhage, hypotension, upright posture Exercise and training Hypertension and heart failure Coronary disease Hemostasis, last CV lecture Formation of a platelet plug Blood coagulation, clot formation Anticlotting systems and drugs Cardiovascular (CV) Introduction levels of organization structure- function homeostatic regulation 6/11/11 3 chemical reactions are ultimately controlled by negative feedback mechanisms S E Introduction Introduction error signal amplification effectors mechanism effect Homeostasis, or constancy of the internal environment, is needed for chemical reactions underlying life to occur. It is maintained, predominantly, through negative feedback mechanisms what it actually is (info from feedback), is compared with what it should be (info from set-point) in a comparator / integrator integrators compare what it should be with what it actually is and generate an error signal S E 6/11/11 4 Introduction the structural elements of the cardiovascular system are organized as >>> The Cardiovascular System: Introduction Introduction Overall design of the CV system Pressure, f ow and resistance >>> a double pump with blood output to, and blood input from, capillaries>>> 6/11/11 5 Introduction Introduction Overall design of the CV system...
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lec 7 cardiovascular1.pptx - 6/11/11 1 Cardiovascular (CV)...

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