Download - Pig Heart Dissection 101
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Biology 30S
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(gulp)But sheep have nice
hearts…
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EquipmentEquipmentPick these up (even if you are not cutting):Pick these up (even if you are not cutting):Plastic apronPlastic apronGogglesGogglesLatex GlovesLatex Gloves
These should be at your table:These should be at your table:Dissecting TrayDissecting TrayDissecting KitDissecting KitPaper TowelPaper TowelDissection GuideDissection Guide
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Supplies you will use:Supplies you will use:
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Set UpSet Up
Start reading the dissection guideStart reading the dissection guideCut out your labels when you are finished Cut out your labels when you are finished
reading (use scissors from the front)reading (use scissors from the front)Class orientationClass orientationRinse your pig heartRinse your pig heartBegin labBegin lab
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Anterior ViewAnterior View
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AtriaAtria
Rt.
Lt.
Ear-Ear-shaped shaped
extensionextension
s of thes of the atria.atria.
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The atria wrap around to The atria wrap around to the the anterioranterior side of the side of the heart.heart.
Anterior
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The Coronary The Coronary VesselsVessels
The cardiac muscle The cardiac muscle receives receives oxygenoxygen for for
metabolism and releases metabolism and releases waste productswaste products into into coronary vessels.coronary vessels.
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AnterioAnterior Viewr View
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The Great VesselsThe Great Vessels
The large veins & arteries, The large veins & arteries, which transport blood to which transport blood to
and from the heart muscle.and from the heart muscle.
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Locating the Locating the great vessels:great vessels:
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Anterior View--Aortic ArchAnterior View--Aortic Arch
AortaAorta
Arising from the Arising from the left ventricle of left ventricle of the heart is the the heart is the largest artery of largest artery of the body, the the body, the aorta.aorta. Rt
.Lt.
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Anterior View--Aortic Anterior View--Aortic ArchArch
Brachiocephalic Brachiocephalic trunk (innominate trunk (innominate
artery)artery)
Rt.
Lt.
Lt. Lt. common common carotidcarotid
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Aorta: Posterior View
AortaAorta
LtLt..
RtRt..
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Posterior View--Vena Cavae
Superior Superior Vena Vena CavaCavaInferior Inferior
Vena Vena CavaCava
Lt.
Rt.
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Posterior View--Pulmonary Artery
Lt. Lt. Pulmonary Pulmonary
ArteryArtery
Lt.
Rt.
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Posterior View--Pulmonary Posterior View--Pulmonary VeinsVeins
Pulmonary veins are inferior to pulmonary Pulmonary veins are inferior to pulmonary arteriesarteries..
RtRt..
LtLt..
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Rt.
Pulmonary VeinLt.
Pulmonary Vein
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Dissect heart on the coronal plane.Dissect heart on the coronal plane.
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Open heart Open heart on on
dissection dissection tray.tray.
Posterior half
Anterior half
Rt.
Lt.
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Sep
tum
Lt. AtriumRt.
Atrium
aort
a
RtRt..
Lt.Lt.
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Rt. Ventricle
Lt. Ventricle
Sep
tum
aort
a
Width of right
ventricular wall
Width of left
ventricular wall
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Chordae
tendinae
Tricuspid valve
Cusp of valve
Papillary
muscles
Septu
m
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Mitral valve
Septu
m
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Septu
m
cusp
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Chordae
tendinae
Chordae
tendinae
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Check points--Exterior HeartCheck points--Exterior Heart
Students should be able to point Students should be able to point out:out:
•ApexApex of heart of heart
•Ventricles & AtriaVentricles & Atria
•Coronary VesselsCoronary Vessels
•AortaAorta
•Pulmonary Artery & VeinPulmonary Artery & Vein
•Sup & Inf Vena CavaSup & Inf Vena Cava
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Check points--Interior HeartCheck points--Interior Heart
Students should be able to point out:Students should be able to point out:
•SeptumSeptum
•AtriaAtria & & VentriclesVentricles
•Aorta, Pulm Artery and VeinAorta, Pulm Artery and Vein
•Sup & Inf Vena CavaSup & Inf Vena Cava
•Tricuspid ValveTricuspid Valve, , Pulmonary Pulmonary ValveValve
•MitralMitral ValveValve, , Aortic ValveAortic Valve
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Final Check pointFinal Check point
Students should be able to trace pathway Students should be able to trace pathway of blood through great vessels and heart.of blood through great vessels and heart.
(begin with vena cava and end with vena cava)(begin with vena cava and end with vena cava)
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Anterior ViewAnterior View
•Rinse your heart under the sink and pat it dry with paper towel
•Notice the coronary artery angling from the left atrium to the right ventricle
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Label Label external external structuresstructures
Posterior ViewPosterior ViewPosterior ViewPosterior View
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Right SideRight Side
Right SideRight SideStart your Start your
incision in the incision in the vena cava and vena cava and cut through the cut through the rt. Atria and rt. rt. Atria and rt. Ventricle all the Ventricle all the way to the apex.way to the apex.
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Start your Start your incision in the incision in the left atrium and left atrium and continue continue through the left through the left ventricle to the ventricle to the apex.apex.
Left SideLeft SideLeft SideLeft Side
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• Open Open heart on heart on dissection dissection tray.tray.
•Be sure to Be sure to pat your pat your heart dry heart dry with paper with paper towel towel before before attaching attaching labelslabels
Posterior half
Anterior half
Rt.
Lt.
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That’s All folks!…and don’t forget
to clean up.
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Clean UpClean UpClean UpClean Up Dispose of paper towels and labels Dispose of paper towels and labels Hearts go into the blue plastic bag (Ms. Harder)Hearts go into the blue plastic bag (Ms. Harder) Wash all of your tools and rinse your dissecting Wash all of your tools and rinse your dissecting
trays (remove bottom and rinse if possible)trays (remove bottom and rinse if possible) Lay removable bottoms over the edgeLay removable bottoms over the edgePlace dry tools on paper towel on tray Place dry tools on paper towel on tray
bottoms!bottoms!Leave kits open!Leave kits open! Wipe off all countersWipe off all counters Dispose of your gloves in the garbageDispose of your gloves in the garbage Wipe off your apron (pail and rag on front bench)Wipe off your apron (pail and rag on front bench)