1. HEART DISSECTION

2.
Cardiovascular rap

3.
HEART ANATOMY (2 MINS)

4. Examination of a Mammalian Heart
LAB INVESTIGATION
Examination of a Mammalian Heart

5. 3 TASKS:
Perform dissection

6. ER Assignments Chief Surgeon handles dissection
Asst. Surgeon ensures procedure is
strictly followed
Circulating Nurse time keeper; keeps records/
notes for the group
Scrub Nurse in charge of “patient” and
equipment; ensures
“operating table” is clean and
in order

7. Heart Dissection Lab 4 16 LAB PERFORMANCE Points
Surgeon
Asst. Surgeon
Circ. Nurse
Scrub Nurse
1. Team completes activity 4
2. Practices lab safety
3. Is engaged; performs
assigned role
4. Cooperates with team
Total (out of 16) 16

8. 3 TASKS:
Perform dissection
Answer questions/ Fill out chart

11. 3 TASKS: Perform dissection Answer questions/ Fill out chart
Draw specimen

12. CHECKLIST Checklist Title and source of material are listed
Drawing is neat and made with clear pencil lines. Labels are neatly written and organized
Listed structures are properly labeled:
right and left atrium, right and left ventricles, aorta, valves between atrium and ventricle
* plus any of the following : vena cava, pulmonary artery, pulmonary vein (some structures may not be clearly visible)
Arrows drawn to show flow of blood through the heart
Accurate representation (not an “idealized” drawing); no colors/shading

14. BLOOD PUMP
4 Chambers
left/right
upper/lower

15. VENA CAVA
AORTA
PULMONARY ARTERY
CORONARY VESSELS

16. LA RA LV RV
DOB OB

18. Flap-like structures that prevent backflow of blood
VALVES
Flap-like structures that prevent backflow of blood

19. The Heart Aorta Pulmonary Artery Valve Pulmonary Vein Valve Vena Cava
Left Atrium
Right Atrium
Valve
Valve
Right Ventricle
Left Ventricle
septum

20. BLOOD FLOW
                                                         

21.                                                          
DOB from body  vena cava  RA  valves  RV  pulmonary artery  LUNGS  pulmonary vein  LA  valves  LV  aorta  OB to body

22. Double Circulatory System
CO2 O2
Lungs
Pulmonary Artery
Pulmonary Vein
CO2 O2
Vena Cava
(main vein)
Aorta
(main artery)
Heart
CO2 O2
Arteries carry blood
Away from the heart
Veins carry blood
towards the heart
Rest of body

23. GUIDE QUESTIONS:
You will also find tiny blood vessels along the surface of the heart. These are the coronary arteries and veins. Why do you think these blood vessels are very important?
The purpose of the valves is to prevent the blood from flowing backward. Using a dissecting needle (or the tip of a forceps), puncture a valve and try to lift the heart. 2- What do you observe? Explain.
Notice that the left ventricle is thicker than the right ventricle. Can you give a reason why?
Observe carefully and compare the thickness of the ventricle walls to the atria walls. Which are thicker? Explain (relate this to the two structures’ behavior).
Why do you think the aorta is designed to be smooth and large?

24. Coronary vessels provide blood supply to the heart muscle.
PEER ASSESSMENT
Coronary vessels provide blood supply to the heart muscle.
Valves are designed to be tough to resist high blood pressure within heart. Damage to valve leads to backflow and mixing of blood which is not efficient.
Left ventricle is thicker since it requires more force (blood pressure) to pump blood out to entire body; right ventricle only pumps blood short distance to the lungs.
Ventricles are thicker. Atria collects blood (only “pump” to ventricles right below) while ventricles pump blood out of heart, requiring a tougher muscular wall to create more force .
Aorta is main pathway of oxygenated blood to body so it needs continuous and steady flow.