sisostep_pigheart.jpg
sisostep_pigheart2.jpg

Questions (copy & paste the questions below & answer them)
  1. Describe which features are most apparent on your heart.
    1. We see the vena cava, aorta, right atrium, Right ventricle, apex, left ventricle and left atrium. The right atrium has been dislocated.
  2. A probe in either the superior or inferior vena cava penetrates the?
    1. Right atrium
  3. A probe in the pulmonary vein terminates which chamber?
    1. Left atrium
  4. A probe in the pulmonary arteries will penetrate which chamber?
    1. Right ventricle
  5. The right chambers of the heart pump what kind of blood?
    1. Deoxygenated
  6. Describe the appearance of the valves.
    1. Filmy, white ring and stiff
  7. Describe the appearance of the papillary muscles.
    1. It's like under-done pork/ firm
  8. Describe how the atrium appears and feels in your words.
    1. Slightly fatty, smaller, and rubbery.
  9. Is the myocardium of the atrium thicker or thinner than the ventricle? Explain why.
    1. This muscle is thinner because it only has to pump to the ventricles.
  10. Name the 2 veins that empty into the right atrium.
    1. Superior and inferior vena cava.
  11. What is the wall that separates the 2 ventricles called?
    1. Interventricular Septum
  12. What is the purpose of the pulmonary veins?
    1. To transport oxygenated blood back to the heart from the lungs.
  13. What is the layer of the heart wall that covers the inside of the chambers? What does it look like?
    1. The endocardium is deeper red, thin, shiny, rubbery and filmy.
  14. Describe the appearance and feel of the walls of the ventricles.
    1. Very thick, hard, sturdy, and greyish red.
  15. How much thicker is your left ventricle from your right?
    1. The left ventricle is far thicker because it goes to the whole body.
  16. What causes a blocked artery in the heart AND what symptoms would indicate a need for bypass surgery?
    1. The blockage is caused by a buildup of fats, mostly cholesterol, in the coronary arteries. The symptoms of a blockage include chest pain and heart attack.
  17. Where doe they get the bypass vessels from in the body?
    1. From the chest wall or a long vein from the leg.
  18. What main vessel do they attach the bypass to?
    1. The aorta.

Conclusion: (write a summary in complete sentences including a description of what you did in the lab, what you liked or disliked, what you learned by completing the dissection and anything you would change about the lab.)

In the lab, me and Sophia dissected a pig heart. What we didn't like about the lab was the experience of cutting open the heart and looking inside it, and the nasty fume smell that was exposed. What we liked about the dissection was a direct way to show us exactly where all the blood vessels was. What we learned by completing the dissection was mostly the connections between blood vessels, but it also showed the differences in the workloads of the parts very effectively. We would like to request that you attempt to procure fresh hearts whenever possible, to reduce expose to fumes. One possible source is moose - just freeze them until it's time.