Title: Anat & Phys 4/5/07 Objectives: Class Topics . Fetal Heart 7/17/2019 Title: Anat & Phys 4/5/07 Objectives: . Class Topics Fetal Heart Heart physiology Heart coloring “There are two types of teachers; the kind that fill you with so much quail shot that you can’t move, and the kind that just gives you a little prod from behind and you jump to the skies.” Robert Frost Wednesday, July 17, 2019 7:03 PM

Class Assignments Heart coloring 4/11/07 Heart coloring W.S. 4/11/07 7/17/2019 Class Assignments What By When Heart coloring 4/11/07 Heart coloring W.S. 4/11/07 Heart test 4/13/07 Due this class period Due next class period Due in the future

Fetal Heart Foramen ovale Ductus arteriosus 7/17/2019 Fetal Heart Foramen ovale hole between the right and left atrium Ductus arteriosus blood vessel between the pulmonary trunk and aorta Both of the above close when the first breath is taken change of pressure

Cardiac Muscle Can beat on its own Intercalated discs 7/17/2019 Cardiac Muscle Can beat on its own If two fibers touch, they beat together Intercalated discs Allow for electrical transfer to other cells.

7/17/2019 Heart Physiology Each beat is stimulated by an area in the right atrium near the superior vena cava called the Sinoatrial Node (SA Node). SA Node is innervated by the autonomic nervous system Pacemaker of the heart Stimulates both atria to contract

7/17/2019 Heart Physiology SA Node sends impulse to the AV (atrioventricular) Node. Located in the interatrial septum Holds impulse for a short time (milliseconds) and passes electrical impulse to AV Bundle (Bundles of His) AV Bundles passes impulse to Purkinje fibers which stimulates the ventricles to contract

FromL http://www.personal.dundee.ac.uk/~jrelliot/HTML1/heart.htm 7/17/2019 FromL http://www.personal.dundee.ac.uk/~jrelliot/HTML1/heart.htm

List of things to color Right atrium left atrium right ventricle 7/17/2019 Right atrium left atrium right ventricle left ventricle myocardium epicardium endocardium oxygenated vessels deoxygenated vessels

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7/17/2019 Blood flow Deoxygenated blood enters the heart from the inferior vena cava, superior vena cava, and the coronary sinus From rt atrium to rt ventricle through the tricuspid valve From rt ventricle to pulmonary trunk through the pulmonary semilunar valve

7/17/2019 Blood flow From the pulmonary trunk to the rt and left pulmonary arteries to the lungs Oxygenated blood returns from the lungs in the pulmonary veins to the left atrium From the left atrium to the left ventricle through the bicuspid valve

7/17/2019 Blood flow From the left ventricle to the aorta through the aortic semilunar valve From the aorta to the rest of the body Back to the right atrium through the inferior vena cava, superior vena cava, and coronary sinus

7/17/2019 Link Gateway Community College http://www.gwc.maricopa.edu/class/bio202/cyberheart/hartint0.htm

7/17/2019 From: http://www.cardioliving.com/consumer/Heart/Images/Heart_Anatomy.JPG

7/17/2019 From: http://info.med.yale.edu/intmed/cardio/echo_atlas/references/heart_anatomy.html