Download TITLE: The Online Heart Activity

TITLE:
The Online Heart Activity
PURPOSE:
To learn the internal structures of a human heart and components of the cardiovascular
system.
MATERIAL:
Internet, paper, pen, color pencils, heart diagram
DIRECTION:
Use the Internet site to answer the following questions and to complete your diagram of
the human heart. For each section of the procedure, a different member of the group must
control the mouse. Each student writes his or her own answer sheet. When you complete
the activity, the instructor will pick one write-up per group to grade. You will need to place
all of the student’s names on the selected write-up before you turn it in to the basket.
PROCEDURE:
A.
Go to www.innerbody.com and click the Cardiovascular System. From the Anatomy Terms box on the left
side of the screen click on the Heart and read the information in the sidebar describing the heart and its
functions. (Make sure you “Click to read more below.”)
1.
What are the differences between the atriums and the ventricles?
2.
Why is one side of the heart smaller than the other?
B.
Go to www.nucleusinc.com/animation2.php and drag your mouse across the parts of the heart to determine
how to label your diagram. You may prefer to use a cross section of the heart to help you. Just google
“heart diagram” and use another image.
C.
You will label the following parts of the heart:
Right /Left
Above/Below
R/L Atriums
Superior and Inferior Vena Cava
R/L Ventricles
Ascending and Descending Aorta
R/L Lungs
R/L Pulmonary Arteries
R/L Pulmonary Veins
D.
Go to http://academic.cengage.com/biology/discipline_content/animations/blood_circulation.swf and watch
the animation plays. Use this link http://nursingcrib.com/wp-content/uploads/pulmonarycirculation261x300.jpg to help trace (using color pencils) on your diagram the pathway of the dark blue,
deoxygenated blood into the right atrium, the right ventricle, and on to the lungs via the pulmonary artery.
Then trace the path of the bright red oxygenated blood from the pulmonary vein, through the left atrium
and ventricle, and out through the aorta to the other organs and tissues of the body.
3.
Why is the blood drawn in two different colors in this illustration, that is, how does the “blue” blood differ
from the “red” blood”? What gives blood its color? Is your blood really blue?
It seems the old misconception that blood is blue when it is deoxygenated will never die.
http://en.wikipedia.org/wiki/Blood
Human blood is red, ranging from bright red when oxygenated to dark red when not. It owes its color to hemoglobin, a metalloprotein
compound containing iron, to which oxygen binds (Oxygen is attracted to iron and when they are together you get rust). There exists a
popular misconception that deoxygenated blood is blue and that blood only becomes red when it comes into contact with oxygen. Blood is
never blue, but veins appear blue because light is diffused by skin. The red light is absorbed by the veins and the blue light is reflected
back to your eye. From a physiological perspective, veins and arteries appear similar when skin is removed and are seen directly. If you
have ever had blood drawn from the arm in your vein, you have seen the dark reddish brown appearance of the deoxygenated blood.
(Some animals do have blue blood. This is because the metal that carries the oxygen in the blood is copper.)
E.
Go to http://academic.cengage.com/biology/discipline_content/animations/blood_circulation.swf and use
the animation to answer the following questions.
4.
What is the difference between the pulmonary and systemic circuits (loops)?
5.
What does the blood drop off in the lungs and what does it pick up in the lungs?
6.
Other than the lungs and the heart, name four major organs through which the blood passes.
F.
Go to http://www.pennmedicine.org/encyclopedia/em_DisplayAnimation.aspx?gcid=000091&ptid=17 and use
the animation to answer the following questions. If this doesn’t work, just use your notes from today.
7.
What are four things that the blood carries to the other cells of the body via the arteries and capillaries?
8.
What one thing does the red blood cell carry away from each body cell? Where does the RBC drop off
these unneeded compounds? What else diffuses into the blood to be carried away from body cells (This is
not carried by the red blood cells)?
G.
Go to http://www.mayoclinic.com/health/coronary-bypass-surgery/MY00087
Scroll down to the animation and click through the stages of a coronary bypass. The coronary arteries are
the arteries running along the surface of the heart muscle. These arteries supply the ever-working heart
muscle with oxygen and nutrients.
9.
From what major artery does the grafted blood vessel pull its blood supply for the heart (pay close
attention to the image)? Where did the grafted blood vessel come from?
H.
Next, go to www.heart.org web page. This is the site for American Heart Association. You will search this
site to answer the follow questions about heart attacks and strokes. For Question #9, begin by doing a
search for “What is a heart attack?” in this site. For the rest of the questions, look at the main menu
choices or use the search.
10.
Describe what happens to the coronary arteries and the heart muscle during a heart attack.
11.
List four to five things that you can do to reduce your risk of heart attack.
12.
What happens during a stroke?
13.
List at least four ways you can help prevent having a stroke.
I.
Call your instructor to your table when you finish. He/she will select the write-up to be graded. Write all
the names on that write-up and turn it into the basket. For the remainder of the class time, look at other
body systems we have studied (Integumentary, Muscle/Skeletal, Nervous, Circulatory Sys.) in the
Innerbody.com site only.