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The Cardiovascular System Entertainment Group Presents: The Heart: A Love Story Human A & P J. Allen Stats of the Heart • Located in the __________ cavity • Shaped like an upside down ______ • ________is the top portion, and ________is the bottom left tip • Covered by the sac-like membrane _____________ – Prevents overstretching, protects, anchors heart • Muscular portion is made up of ___________ muscle tissue, which is involuntary, striated, and contains ______________ disks • Myocardium contains many ____________, as the heart needs tons of energy base apex GROOVY STRUCTURE • 2 upper chambers called ___________ • 2 lower chambers called____________ • Divider between R and L sides called the ___________ – Interatrial and Interventricular septa Septum ATRIA AND VENTRICLES • RIGHT ATRIUM— RECEIVES ______________ BLOOD FROM THE BODY • RIGHT VENTRICLE— PUMPS TO _______ (PULMONARY CIRC) • LEFT ATRIUM— RECEIVES ______________ BLOOD FROM __________ • LEFT VENTRICLE— PUMPS BLOOD TO ENTIRE _______ (SYSTEMIC CIRC) – THICKER __________________ The Pumping Heart • What does the blue represent? • What does the red represent? Heart Valves • REVENT __________OF BLOOD • A/V—ATRIOVENTRICULAR – TRICUSPID— 3 flaps-__________side – BICUSPID (___________)—2 flaps– left side • SEMILUNAR—between ventricles and ___________ – PULMONARY—r. ventricle to ____________ artery – AORTIC– l. ventricle to the ______________ • CHORDAE TENDINAE – “________________” DIAGRAM papillary muscle chordae tendinae septum ELECTRICAL CONDUCTION 1. ____ node (sinoatrial) – Sets the rhythm – Heart’s natural _____________ 2. ___ node (atrioventricular) 3. AV Bundles • Along septum 4. ________Fibers • throughout heart muscle Q) What instrument is used to stop the heart? DEFIBRILLATOR Q) Why stop the heart during a heart attack? TO ALLOW THE PACEMAKER TO RESET ELECTRICAL CONDUCTION CHEMICAL REGULATORS OF THE HEART: 1. Hormones (4 main) • Increase: – ______________ – ______________ – ______________ • Decrease: – ______________ 2. Ions • Increase: – ___________ • Decrease: – ________&________ • The ________________ is the cardiac and respiratory center of the brain • The nerve responsible for conducting to the heart is called the ________nerve. (10th Cranial Nerve) Lup dup lup dup lup dup lup • Blood Pressure – “LUP” • When A/V valves close, and ventricles contract, it is termed _____________ – “DUP” • WHEN A/V VALVES OPEN AND VENTRICLES ARE RELAXED, IT IS TERMED ______________ – Bp is measured as ____________ • Normal bp is __________ Read as: _______________________ Measured by an instrument called a ______________________ Lup dup lup dup lup dup lup Q) WHAT DOES IT LOOK LIKE? http://www.getbodysmart.co m/ap/circulatory/heart/cardi accycle/cardiaccycle.html ELECTROCARDIOGRAM • EKG OR ECG • Monitors heart rhythm • Detects presence of a _______