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Pig Heart Dissection Workshop Pig Heart Dissection Workshop Two parts to this session: Pre-dissection activities: • Drawing activity • Heart-Walk activity • Electrophysiology activity • Pig heart dissection Draw-the-Heart A Pre-Dissection Pig Heart Activity D. Kacher - DeBakey High School for Health Professions Supplies needed: two sheets of blank paper pencil (with eraser) Highlighters or colored pencils (blue, red, green, yellow) Objectives Upon completion of this lesson, you should be able to: identify great vessels & valves associated with right & left sides of the heart differentiate between systemic & pulmonary circulation trace the pathway of blood through the heart The heart is a double pump right heart pump left heart pump The right heart pumps deoxygenated blood. (Called deoxygenated although it has approximately 68% - 75% oxygen.) The left heart pumps oxygenated blood (94%-100%). called “venous”blood: blood – leaves body Deoxygenated tissues returns to right heart, which pumps it to lungs where it’s “reoxygenated” leaves lungs and returns to left heart Movement of blood from heart to lungs & back to heart is referred to as pulmonary circulation or the Drawing the right heart. Step 1: Draw outline of heart; label as seen below. Rt. side Lf. side apex Throughout this exercise, there will be yellow highlighting to show drawing sequence. Step 2: Draw myocardium & septum; identify chambers. Rt. side Lf. side LA RA RV LV apex Step 3: Draw superior vena cava (SVC) & inferior vena cava (IVC). Rt. side Lf. side SVC LA RA IVC RV LV apex Step 4:Draw pulmonary artery & wall of right atrium Rt. side Lf. side SVC LA RA pulmonary artery IVC RV LV apex The pulmonary artery is the only artery in the body to carry deoxygenated blood. Remember: Arteries carry blood Away from the heart. Step 5: Draw tricuspid & pulmonary valves. Rt. side Lf. side SVC pulmonary valve LA pulmonary artery RA tricuspid valve IVC RV LV apex Step 6: Outline great vessels & chambers in blue. Rt. side Lf. side SVC pulmonary valve LA pulmonary artery RA tricuspid valve IVC RV LV apex Step 7: Color myocardium & valves. Rt. side Lf. side SVC pulmonary valve LA pulmonary artery RA tricuspid valve IVC RV LV apex Step 8: Indicate pathway of blood with blue arrows. Rt. side Lf. side SVC pulmonary valve LA pulmonary artery RA tricuspid valve IVC RV LV apex Next, we move to the left heart. Left heart blood: called “arterial” blood- leaves lungs as highly oxygenated blood (94% - 100%) returns to left heart pumped to organ systems (including the heart--coronary arteries) referred to as systemic circulation or the systemic circuit Drawing the left heart. Step 1: Draw outline of heart; label as seen below Rt. side Lf. side apex Step 2: Draw myocardium & septum; identify chambers Rt. side Lf. side LA RA RV LV apex Step 3: Draw aorta & upper wall of left atrium Rt. side Lf. side aorta LA RA RV descending aorta LV apex Step 4: Draw & label pulmonary veins Rt. side Lf. side aorta pulmonary veins pulmonary veins LA RA RV descending aorta LV apex Step 5: Draw mitral & aortic valves. Rt. side Lf. side aorta pulmonary veins pulmonary veins LA mitral valve RA aortic valve RV descending aorta LV apex “Pronunciation .” mitral = mI-trall prefix: mi- = two Step 6: Outline chambers & great vessels in red. Rt. side Lf. side aorta pulmonary veins pulmonary veins LA mitral valve RA aortic valve RV descending aorta LV apex Step 7: Color the myocardium & valves. Rt. side Lf. side aorta pulmonary veins pulmonary veins LA mitral valve RA aortic valve RV descending aorta LV apex Step 8: Indicate pathway of blood with arrows. Rt. side Lf. side aorta pulmonary veins pulmonary veins LA mitral valve RA aortic valve RV descending aorta LV apex Post Test: 1.Please clear your desks. 2.Take out a sheet of notebook paper. 3.Write your name and proper heading at top of paper. 1. Does the left heart transport high or low oxygenated blood? 2. Which great vessels are associated with the right heart? 3. Name the heart valves associated with the right heart. 4. Which great vessels are associated with the left heart? 5. Which two heart valves are associated with the left heart? 6. What does the Latin word “septum” mean? 7. Why are heart valves “one-way” valves? 8. In the term mitral, what does the prefix “mi-” mean? 9. Which artery carries deoxygenated blood? 10.What does “systemic circulation” refer to? 11.What does “pulmonary circulation refer to?” 12.Which muscular wall do you think is thicker-the right ventricular myocardium or the left ventricular myocardium– and why?