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Lab 2
Anatomy of the Heart
Exercise 30
Activity 1: Using the Heart Model to Study Heart Anatomy.
Use Lab Exam 1 Review Sheet as guide.
Activity 2: Tracing the Path of Blood Through the Heart
Activity 4: (Activity 3 in 8th Edition) Examining Cardiac Muscle Tissue Anatomy, 3.
Dissection of the Sheep Heart. Follow instructions in the lab manual and given in lab.
Use the Lab Exam 1 Review Sheet as a guide.
Name ____________________________
Section _________________
Turn in at the end of lab or at the next regular class.
Sheep Heart Dissection
1. Contrast the thickness of the fused fibrous pericardium and serous layer of the parietal
pericardium to the thickness of the visceral layer of the serous pericardium.
(Sometimes just called parietal and visceral pericardia.)
2. a. Which ventricle has a thicker myocardium?
b. How does this relate to its function?
3. a. What is the role of the semilunar valves?
4. a. What is the role of the atrioventricular valves?
Activity
Use arrows drawn with colored pencils to trace the paths of blood into, out of and
through the heart and all the vessels and chambers shown on the figure. Use red for
well-oxygenated blood and blue for poorly oxygenated blood. Points will be deducted for
other colors.
Label: pulmonary and aortic semilunar valves and the tricuspid and bicuspid
valves. Print the labels in the margins.
7. Trace a drop of blood through the heart. Start with the right atrium and end with the
aorta. List all chambers, valves and vessels in the pathway.
Right atrium 
____________________________________
____________________________________
____________________________________
____________________________________
____________________________________
Lung capillaries
____________________________________
____________________________________
____________________________________
____________________________________
____________________________________
Aorta
Preparing for Lab 3 – the ECG
Next week in lab we are going to run experiments on the effect of exercise on the lengths
of systole and diastole. The data will be used to prepare a modified lab report. As a part
of your preparation for the lab, please do the following:
1. Read over the experiment in Lab 3 so that you have an idea of what we will be
doing during lab.
2. There are instructions writing a lab report attached to lab 3. I have copied the
section on the Introduction below. Please read this over carefully.
3. Prepare the Introduction for the lab exercise following the directions, and
turn it in with Lab 2 for comments. Please staple it to the Lab 2 sheets. It
must be typed or word-processed. The Introduction is worth 20 points in the lab
report, so take some time to do it well. You will have one chance to redo it after
reading the comments.
Introduction
The purpose of an introduction is to give readers and idea of what you plan to do,
why you plan to do it , and what you think will happen. Please include in this order.
To begin the project, please number your answers to correspond with the suggestions.
1. What is your objective? (What do you plan to test?)
2. Why is this study of scientific interest?
3. Describe the conclusions of one previously published study, to help explain why
the current study is of scientific interest.
a. It is important to cite sources in the introduction section of your paper as
evidence of the claims you are making. Use the (author’s last name, date
of publication) method of in text citations. For example (Marieb, 2010).
For web sites use (URL). Note that articles by one or two authors are
always cited in the text using their last names. However, if there are more
than two authors, the last name of the 1st author is given followed by the
abbreviation et al., which is Latin for "and others".
b. Make sure you give a full citation in the Literature Cited section for all
sources mentioned in the text.
4. Define pulse, systole, diastole and the cardiac cycle. Describe the length of time
parts of the heart are in systole, and the length of time both the atria and the
ventricles are in diastole. Use a 0.8s cardiac cycle for your example. Describe an
ECG and explain how the lengths of systole and diastole can be estimated from an
ECG. Information about this is included with Lab 3.
5. Describe personal observations about your heartbeat during exercise.
6. Describe which part of the cycle is most affected by an increased heart rate, and
why.
7. The last sentences of the introduction should be a statement of your
hypotheses. Use “I think” , not “I believe.” It should have 3 parts; systole,
diastole and pulse