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Fetal Heart Physiology: Coloring & Anatomy

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  1. 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 . Title: Anat & Phys 4/5/07 Class Topics Objectives: Saturday, December 21, 201912:32 AM

  2. 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

  3. 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

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

  5. 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

  6. Heart Physiology • SA Nodesends 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

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

  8. List of things to color • Right atrium • left atrium • right ventricle • left ventricle • myocardium • epicardium • endocardium • oxygenated vessels • deoxygenated vessels

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  11. 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

  12. 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

  13. 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

  14. Link • Gateway Community Collegehttp://www.gwc.maricopa.edu/class/bio202/cyberheart/hartint0.htm

  15. From: http://www.cardioliving.com/consumer/Heart/Images/Heart_Anatomy.JPG

  16. From: http://info.med.yale.edu/intmed/cardio/echo_atlas/references/heart_anatomy.html

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