Pig Heart Dissection Workshop

Pig Heart Dissection Workshop

Two parts to this session:

• Drawing activity• Heart-Walk activity• Electrophysiology activity

Pre-dissection activities:

• Pig heart dissection

Draw-the-HeartA Pre-Dissection Pig Heart Activity

D. Kacher - DeBakey High School for Health Professions

Supplies needed:two sheets of blank paperpencil (with eraser)Highlighters or colored pencils (blue, red, green, yellow)

ObjectivesUpon completion of this lesson, you should be able to:identify great vessels & valves associated with right & left sides of the heartdifferentiate between systemic & pulmonary circulationtrace the pathway of blood through the heart

The heart is a double pump

rightheartpump

leftheartpump

The right heart pumps deoxygenated blood.

The left heart pumps oxygenated blood (94%-100%).

(Called deoxygenated although it has approximately 68% - 75% oxygen.)

Deoxygenated blood:called “venous” blood – leaves body tissuesreturns to right heart, which pumps it to lungs where it’s “re-oxygenated”

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 pulmonary circuit

Drawing the right heart.

Step 1:Draw outline of heart; label as seen below.

apex

Rt. side Lf. side

Throughout this exercise, there will be yellow highlighting to show drawing sequence.

Step 2:Draw myocardium & septum; identify chambers.

RV LV

septum

apex

RA

LA

Rt. side Lf. side

apex

Step 3: Draw superior vena cava (SVC) & inferior vena cava (IVC).

RV LV

septum

SVC

IVC

RA

LA

Rt. side Lf. side

apexRV LV

septum

Step 4:Draw pulmonary artery & wall of right atrium

pulmonary artery

RA

LA

Rt. side Lf. side

SVC

IVC

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.

apexRV LV

septum

pulmonary artery

tricuspid valve

pulmonaryvalve RA

LA

Rt. side Lf. side

SVC

IVC

Step 6: Outline great vessels & chambers in blue.

RV LV

septumtricuspid valve

pulmonaryvalve RA

LA

apex

Rt. side Lf. side

SVC

IVC

pulmonary artery

Step 7: Color myocardium & valves.

RV LV

septumtricuspid valve

pulmonaryvalve RA

LA

apex

Rt. side Lf. side

SVC

IVC

pulmonary artery

Step 8: Indicate pathway of blood with blue arrows.

RA

LA

RV LV

tricuspid valve

pulmonaryvalve

apex

Rt. side Lf. side

SVC

IVC

pulmonary artery

Next, we move to the left heart.

Left heart blood:called “arterial” blood- leaves lungs as highly oxygenated blood (94% - 100%)returns to left heartpumped 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 belowRt. side Lf. side

apex

Step 2:Draw myocardium & septum; identify chambers

RV LV

septum

RA

Rt. side Lf. side

apex

LA

Rt. side Lf. side

RV LV

septum

apex

RA aortic

root

descending aorta

Step 3: Draw aorta & upper wall of left atrium

aortaaorticarch

LA

Rt. side Lf. side

RV LV

septum

apex

RA aortic

root

descending aorta

Step 4: Draw & label pulmonary veins

aortaaorticarch

LApulmonary

veinspulmonary

veins

Step 5: Draw mitral & aortic valves.

Rt. side Lf. side

RV LV

septum

apex

RA aortic

root

descending aorta

mitral valveaortic valve

aortaaorticarch

LApulmonary

veinspulmonary

veins

mitral = mI-trallprefix: mi- = two

“Pronunciation .”

Rt. side Lf. side

RV LV

septum

apex

RA aortic

root

descending aorta

mitral valveaortic valve

Step 6: Outline chambers & great vessels in red.

aortaaorticarch

LApulmonary

veinspulmonary

veins

Step 7: Color the myocardium & valves.

Rt. side Lf. side

RV LV

septum

apex

RA aortic

root

descending aorta

mitral valveaortic valve

aortaaorticarch

LApulmonary

veinspulmonary

veins

Step 8: Indicate pathway of blood with arrows.

Rt. side Lf. side

RV LV

septum

apex

RA

LA

aortaaorticarch

aortic

root

descending aorta

mitral valveaortic valve

pulmonary veins

pulmonary veins

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?