Download Sheep Heart Dissection Lab

Sheep heart dissection Lab
Purpose: To observe the external and internal structure of a sheep heart.
To compare the structure of a sheep heart to a human heart.
Observations: List 3 general observations of the internal structure of the heart.
Include anything that you weren’t expecting.
1.
2.
3.
Locate the top chambers of the heart.
4. What do you call these chambers?
5. What is their function?
6. Observations:
Locate the bottom chambers of the heart.
7. What do you call these chambers?
8. What is their function?
9. Observations:
Find the “stringy” parts on either side of the heart.
10. What are these called?
11. What is their function?
Label the diagram of the human heart below. (fill in the names that are missing in the box)
1. aorta
2. superior vena cava
3. pulmonary artery
4. pulmonary vein
5. __________________________________
6. tricuspid valve
7. __________________________________
8. inferior vena cava
9. pulmonary artery
10. pulmonary vein
11. _________________________________
12. mitral valve
13. aortic valve
14. _________________________________
15. aorta
Analysis Questions
1. Which side of the heart is the strongest (left or right)? Why?
2. How many chambers are found in the mammalian heart? List these chambers.
3. Which chambers are the pumping chambers of the heart?
4. Which chambers are the receiving chambers of the heart?
5. Use a probe and try to locate the aorta? If you are coming from the outside part of the heart to the
inside, where does the probe lead to?
6. Use a probe to trace a path for blood flow.
a) Which part of the heart did the probe lead to or from?
b) Where do you think it would be traveling?
c) What type of blood would it be carrying?
7. How do the walls of the atria compare with the walls of the ventricles and why are they different?
8. What is the purpose of heart valves?
9. Name & compare the heart valves found between the upper & lower chambers of the right and left
sides of the heart.
10. Vessels that carry blood away from the heart are called __________, while __________ carry
blood toward the heart.
11. Which artery is the largest?
12. What is the purpose of the coronary artery and what results if there is blockage in this vessel?
13. Can an artery carry deoxygenated blood? Explain.
14. Using words, trace blood flow through the major blood vessels and heart, starting with
deoxygenated blood returned from the body. Attach another page if necessary.