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Mammalian Heart Dissection TeacherWeb

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					NAME _____________________________

LAB          MAMMALIAN HEART DISSECTION

INTRODUCTION

Mammals have a 4-chambered heart, just like humans. By studying the anatomy of a mammal's
heart, you can learn about how your own heart pumps blood through your body to keep you alive.

MATERIALS & METHODS

    Mammalian heart, dissecting pan, probes, scalpel, gloves

EXTERNAL ANATOMY

    FIND the following structures on your heart and be ready to identify each one to your
     teacher. Then, LABEL them on the sketch below.

      right atrium, left atrium, right ventricle, left ventricle, aorta, superior vena cava,
      inferior vena cava, pulmonary arteries, pulmonary veins, coronary blood vessels




INTERNAL ANATOMY

    Using the scalpel, cut open the heart following the directions of your teacher. FIND the
     following structures on your heart and be ready to identify each one to your teacher.
     Then, LABEL them on the sketch below.

      right atrium, left atrium, right ventricle, left ventricle, aorta, pulmonary arteries,
      pulmonary veins, right AV valve, left AV valve, aortic valve, pulmonary valve, septum
DISCUSSION

1. Compare the atria & the ventricles. Why are the ventricles more muscular than the atria?

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2. Compare the LEFT & RIGHT ventricles. Why is the LV more muscular than the RV?

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3. Which arteries carry deoxygenated (oxygen-poor) blood?

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4. Why are they called "arteries" if they carry deoxygenated blood?

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5. What is the difference between pulmonary circulation & systemic circulation?

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6. What problems can arise if rheumatic fever is not treated?

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7. Where are coronary arteries found? What is their function?

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8. Which arteries, if blocked with plaque & cholesterol, can cause a heart attack?

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9. Trace the pathway of a blood cell FROM the vena cavae THROUGH the heart muscle TO a
   bone cell in your finger. Please be very specific!

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