Transcript PigHeartDissection

Biology 30S
(gulp)
But sheep have nice hearts…
Equipment
Pick these up (even if you are not cutting):
 Plastic apron
 Goggles
 Latex Gloves
These should be at your table:
 Dissecting Tray
 Dissecting Kit
 Paper Towel
 Dissection Guide
Supplies you will use:
Set Up
Start reading the dissection guide
 Cut out your labels when you are finished
reading (use scissors from the front)
 Class orientation
 Rinse your pig heart
 Begin lab

Anterior View
Atria
Ear-shaped
extensions
of the atria.
Rt.
Lt.
The atria wrap around to the
anterior side of the heart.
Anterior
The Coronary Vessels
The cardiac muscle receives
oxygen for metabolism and
releases waste products into
coronary vessels.
Anterior
View
The Great Vessels
The large veins & arteries,
which transport blood to and
from the heart muscle.
Locating the
great vessels:
Anterior View--Aortic Arch
Aorta
Arising from the left
ventricle of the
heart is the largest
artery of the body,
the aorta.
Rt.
Lt.
Anterior View--Aortic Arch
Brachiocephalic
trunk (innominate
artery)
Rt.
Lt. common
carotid
Lt.
Aorta: Posterior View
Aorta
Lt.
Rt.
Posterior View--Vena Cavae
Superior
Vena Cava
Inferior
Vena Cava
Lt.
Rt.
Posterior View--Pulmonary Artery
Lt. Pulmonary
Artery
Lt.
Rt.
Posterior View--Pulmonary Veins
Rt.
Lt.
Pulmonary veins are inferior to pulmonary arteries.
Rt.
Lt.
Pulmonary
Vein
Pulmonary
Vein
Dissect heart on the coronal plane.
Open heart
on dissection
tray.
Anterior half
Posterior
half
Rt.
Lt.
Rt. Atrium
Rt.
Lt. Atrium
Lt.
Width of right
ventricular
wall
Rt. Ventricle
Width of
left
ventricular
wall
Lt. Ventricle
Tricuspid
valve
Cusp of
valve
Papillary
muscles
Chordae
tendinae
Mitral
valve
Chordae
tendinae
Chordae
tendinae
Check points--Exterior Heart
Students should be able to point out:
•Apex of heart
•Ventricles & Atria
•Coronary Vessels
•Aorta
•Pulmonary Artery & Vein
•Sup & Inf Vena Cava
Check points--Interior Heart
Students should be able to point out:
•Septum
•Atria & Ventricles
•Aorta, Pulm Artery and Vein
•Sup & Inf Vena Cava
•Tricuspid Valve, Pulmonary Valve
•Mitral Valve, Aortic Valve
Final Check point
Students should be able to trace pathway of blood
through great vessels and heart.
(begin with vena cava and end with vena cava)
Anterior 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
Posterior View

Label
external
structures
Right Side
Right Side
 Start your
incision in the
vena cava and
cut through the
rt. Atria and rt.
Ventricle all the
way to the apex.
Left Side

Start your
incision in the
left atrium and
continue
through the left
ventricle to the
apex.
• Open heart
on dissection
tray.
Anterior half
•Be sure to
pat your heart
dry with
paper towel
before
attaching
labels
Posterior
half
Rt.
Lt.
That’s All folks!
…and don’t forget
to clean up.
Clean Up

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Dispose of paper towels and labels
Hearts go into the blue plastic bag (Ms. Harder)
Wash all of your tools and rinse your dissecting
trays (remove bottom and rinse if possible)
Lay removable bottoms over the edge
Place dry tools on paper towel on tray
bottoms!
 Leave kits open!
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Wipe off all counters
Dispose of your gloves in the garbage
Wipe off your apron (pail and rag on front bench)