Transcript Draw-the-Heart

Pig Heart Dissection
Workshop
Pig Heart Dissection
Workshop
Two parts to this session:
Pre-dissection activities:
• Drawing activity
• Heart-Walk activity
• Electrophysiology activity
• Pig heart dissection
Draw-the-Heart
A Pre-Dissection Pig Heart Activity
D. Kacher - DeBakey High School for Health Professions
Supplies needed:
two sheets of blank paper
pencil (with eraser)
Highlighters or colored pencils
(blue, red, green, yellow)
Objectives
Upon completion of this lesson, you should be
able to:
identify great vessels & valves associated
with right & left sides of the heart
differentiate between systemic &
pulmonary circulation
trace the pathway of blood through the
heart
The heart is a double pump
right
heart
pump
left
heart
pump
The right heart pumps deoxygenated
blood.
(Called deoxygenated although it has
approximately 68% - 75% oxygen.)
The left heart pumps oxygenated blood
(94%-100%).
called “venous”blood:
blood – leaves body
Deoxygenated
tissues
returns to right heart, which pumps
it to lungs where it’s “reoxygenated”
leaves lungs and returns to left
heart
Movement of blood from heart to
lungs & back to heart is referred to as
pulmonary circulation or the
Drawing the right heart.
Step 1:
Draw outline of heart; label as seen below.
Rt. side
Lf. side
apex
Throughout this exercise, there will
be yellow highlighting to show
drawing sequence.
Step 2:
Draw myocardium & septum; identify chambers.
Rt. side
Lf. side
LA
RA
RV
LV
apex
Step 3: Draw superior vena cava (SVC) &
inferior vena cava (IVC).
Rt. side
Lf. side
SVC
LA
RA
IVC
RV
LV
apex
Step 4:Draw pulmonary artery & wall of right
atrium
Rt. side
Lf. side
SVC
LA
RA
pulmonary artery
IVC
RV
LV
apex
The pulmonary artery is the only artery in the
body to carry deoxygenated blood.
Remember:
Arteries carry blood Away from the heart.
Step 5: Draw tricuspid & pulmonary valves.
Rt. side
Lf. side
SVC
pulmonary
valve
LA
pulmonary artery
RA
tricuspid valve
IVC
RV
LV
apex
Step 6:
Outline great vessels & chambers in blue.
Rt. side
Lf. side
SVC
pulmonary
valve
LA
pulmonary artery
RA
tricuspid valve
IVC
RV
LV
apex
Step 7: Color myocardium & valves.
Rt. side
Lf. side
SVC
pulmonary
valve
LA
pulmonary artery
RA
tricuspid valve
IVC
RV
LV
apex
Step 8: Indicate pathway of blood with blue arrows.
Rt. side
Lf. side
SVC
pulmonary
valve
LA
pulmonary artery
RA
tricuspid valve
IVC
RV
LV
apex
Next, we move to the left heart.
Left heart blood:
called “arterial” blood- leaves lungs as
highly oxygenated blood (94% - 100%)
returns to left heart
pumped to organ systems
(including the heart--coronary
arteries)
referred to as systemic circulation or
the systemic circuit
Drawing the left heart.
Step 1:
Draw outline of heart; label as seen below
Rt. side
Lf. side
apex
Step 2:
Draw myocardium & septum; identify chambers
Rt. side
Lf. side
LA
RA
RV
LV
apex
Step 3: Draw aorta & upper wall of left atrium
Rt. side
Lf. side
aorta
LA
RA
RV
descending aorta
LV
apex
Step 4: Draw & label pulmonary veins
Rt. side
Lf. side
aorta
pulmonary
veins
pulmonary
veins
LA
RA
RV
descending aorta
LV
apex
Step 5: Draw mitral & aortic valves.
Rt. side
Lf. side
aorta
pulmonary
veins
pulmonary
veins
LA
mitral valve
RA
aortic valve
RV
descending aorta
LV
apex
“Pronunciation
.”
mitral = mI-trall
prefix: mi-
= two
Step 6: Outline chambers & great vessels in red.
Rt. side
Lf. side
aorta
pulmonary
veins
pulmonary
veins
LA
mitral valve
RA
aortic valve
RV
descending aorta
LV
apex
Step 7: Color the myocardium & valves.
Rt. side
Lf. side
aorta
pulmonary
veins
pulmonary
veins
LA
mitral valve
RA
aortic valve
RV
descending aorta
LV
apex
Step 8: Indicate pathway of blood with arrows.
Rt. side
Lf. side
aorta
pulmonary
veins
pulmonary
veins
LA
mitral valve
RA
aortic valve
RV
descending aorta
LV
apex
Post Test:
1.Please clear your desks.
2.Take out a sheet of notebook paper.
3.Write your name and proper heading at
top of paper.
1. Does the left heart transport high or low
oxygenated blood?
2. Which great vessels are associated with the
right heart?
3. Name the heart valves associated with the
right heart.
4. Which great vessels are associated with the
left heart?
5. Which two heart valves are associated with
the left heart?
6. What does the Latin word “septum” mean?
7. Why are heart valves “one-way” valves?
8. In the term mitral, what does the prefix “mi-”
mean?
9. Which artery carries deoxygenated blood?
10.What does “systemic circulation” refer to?
11.What does “pulmonary circulation refer to?”
12.Which muscular wall do you think is thicker-the right ventricular myocardium or the left
ventricular myocardium– and why?