Circulatory System
Experiments
Name: ______________________________________________
Title: To Dissect, Display and Identify the parts of the heart.
Apparatus:
Scalpels, Sheep’s heart, dissecting board, gloves.
Method:
1. Distinguish between the ventral and dorsal surfaces of the
heart.
2. Identify the major blood vessels. See the difference between
arteries and veins.
3. Make a shallow cut in the left atrium and left ventricle.
4. Locate bicuspid valves and chordinae tendinae.
5. Make a shallow cut in the right atrium and right ventricle.
6. Locate the tricuspid valves and chordinae tendinae.
7. Locate the septum. Notice the thickness of the left ventricle
compared to the right.
Results:
Draw a labelled diagram of the heart.
Exam Questions:
1. When dissecting the heart, where exactly did you find the
tricuspid valve?
2. Where did you find the bicuspid valve?
3. Describe the steps taken to show in the inner structure of the
heart.
4. What was the difference between the veins and arteries?
5. Draw and label a diagram of the heart.
Title: To Investigate the effect of exercise on the pulse rate of a
human.
Apparatus:
Timer
Method:
1. While at rest, measure your pulse.
2. Repeat three times, get an average.
3. Walk slowly for 2 minutes. Measure pulse for minute.
4. Carry out more difficult exercise (joggings) for 2 minutes.
Measure pulse for one minute.
5. Carry out strenuous exercise for 2 minutes. Measure pulse
Results:
Pulse before exercise
Before Exercise
1
2
3
Average
Resting pulse
Pulse After Exercise
Activity
Slow Walk
Jogging
Strenuous
Pulse
Conclusion:
After exercise, the pulse gets faster, as the heart is beating faster
to move more oxygen around the body.
Exam Questions:
1. How did you measure the pulse?
2. What is the effect of exercise on the pulse rate? Why?
3. Outline how the heart beat cycle occurs.
0
