Jason Figueroa - 12 Virtual Sheep Heart Dissection PDF

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virtual sheep heart dissection...

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STUDENT LABORATORY — Virtual Sheep Heart Dissection Full Name _ Lab Section

_ Lab Instructor

Lab Date Credit 1 lab

Standards • • Objectives • •

Common Core Standards: Reading (9-10): 3,4 Living Environment Core Curriculum Performance Indicators: 1.3.1 Identify the chambers of the heart and the major blood vessels that lead into and out of those chambers Trace the path that blood takes through the heart

Pre-lab Watch this video that uses interactive software to familiarize yourself with the structures of the mammalian heart and describe the role of any three structures described in the video: https://youtu.be/9I-XcW0XXzg

-----------------------------------------------LABORATORY EXERCISE----------------------------------------------Materials A device with an internet connection. Procedure Watch the “oh worm!” Heart Dissection on YouTube and answer the questions below. Check the box ¨ when each step is complete. Time stamps from the video are provided and the video may have to be paused to allow time to answer the questions. Link to the dissection here: https://youtu.be/u7aulbVvU2s 1. ¨ 0:39 – Orienting the heart Dorsal and Ventral Remember that each side of the heart is labeled according to the side of the animal’s body in which it is located. The heart’s right side will be on your left and the heart’s left side will be on your right. Which side of the heart (dorsal or ventral) would be facing the sheep’s belly?

2. ¨ 1:14 – Ventral side How can you determine by looking at the heart, which side is the ventral surface?

3. ¨ 1:21 – Auricles What is the purpose of auricles?

4. ¨ 1:27 – Coronary Artery How is the coronary artery identified on the sheep heart?

5. ¨ 1:47 – Right Atrium, Right Ventricle, tricuspid valve Describe the path blood takes on the right side of the heart including the blood vessels and chambers.

Is the blood on the right side of the heart oxygenated or deoxygenated?

What is the role of the tricuspid valve?

6. ¨ 2:35 – Chordae Tendineae “Heart Strings” What is the function of the chordae tendineae?

7. ¨ 2:58 – Pulmonary Valve Where is the pulmonary valve located?

8. ¨ 3:04–Left Atrium, Left Ventricle, and Aorta Describe the path blood takes from the right ventricle through the aorta including all vessels, chambers and relevant organs.

Is the blood on the right side of the heart oxygenated or deoxygenated?

9. ¨ 3:31 – Mitral (Bicuspid) Valve Where is the mitral valve located?

10. ¨ 3:54 – Semilunar Valve Where is the semilunar valve located?

How does this valve prevent backflow?

11. ¨ 4:17 – Cardiac muscle cells. Why is the left ventricle thicker than the right ventricle?

12. ¨ 4:28 – Myocardium and Epicardium Distinguish between the structures of the myocardium and epicardium.

13. ¨ 4:48 – Blood Vessels Which color straw indicates oxygenated blood? Deoxygenated blood?

Do these colors indicate the colors of real blood? Why is there a misconception that deoxygenated blood is blue? (read this: Why Do Many Think Human Blood is Blue?)

14. ¨ 4:50 – Important Arteries and Veins Describe the path blood flows from the vena cava to the aorta including all relevant blood vessels, chambers and other organs.

Lab continued on the next page

Analysis and Conclusion 1. Identify the parts of the sheep heart using the pictures and tables below.

Ventral Sheep Heart Dorsal Sheep Heart External Anatomy – Identify the numbered parts of the sheep heart

1 2 3 4 5 6 7a 7b 8 9 10 11

Lab continued on the next page

Internal Anatomy – Identify the numbered structures of the heart *Note — The pulmonary vein is not visible in this view.

Above: Cross Section of the Mammalian Heart: Ventral View

Internal Anatomy – Identify the structures of the heart 1

8

2

9

3

10

4

11

5

12

6

13

7

*Note — The pulmonary vein is not visible in this view.

Hey! You Have Now Completed the Sheep Heart Lab! *Important — Save this lab for your records. Upload this lab report to your Google Classroom for lab credit...