HEART DISSECTION

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HEART DISSECTION
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http//www.youtube.com/watch?vLqhvmUEdOYYfeature
search Cardiovascular rap
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http//www.youtube.com/watch?vH04d3rJCLCE HEART
ANATOMY (2 MINS)
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LAB INVESTIGATION
Examination of a Mammalian Heart
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3 TASKS

• Perform dissection
• Answer questions
• Draw specimen
• HW Complete Assessment 2 - Includes
• Chart/Questions/Drawing
• (refer to rubric) 24 points

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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

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

• 4 Chambers
• left/right
• upper/lower

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VENA CAVA
AORTA
PULMONARY ARTERY
CORONARY VESSELS
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Label game
http//www.purposegames.com/game/913
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LA
RA
LV
RV
DOB
OB
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BLOOD FLOW
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DOB from body ? vena cava ? RA ? valves ? RV ?
pulmonary artery ? LUNGS ? pulmonary vein ? LA ?
valves ? LV ? aorta ? OB to body
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The Heart
Aorta
Pulmonary Artery
Pulmonary Vein
Vena Cava
Left Atrium
Right Atrium
Left Ventricle
Right Ventricle
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VALVES
Flap-like structures that prevent backflow of
blood and help maintain pressure
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Double Circulatory System
CO2
O2
Lungs
Pulmonary Vein
Pulmonary Artery
CO2
O2
Aorta (main artery)
Vena Cava (main vein)
Heart
O2
CO2
Arteries carry blood Away from the heart
Veins carry blood towards the heart
Rest of body
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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?

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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.
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Circulation rap http//www.youtube.com/watch?vLq
hvmUEdOYYfeatureplayer_embedded
http//www.pbs.org/wgbh/nova/eheart/transplantwave
.html