Sheep Heart Dissection
Do Now:
Think-Pair-Share with your lab partner 3 reasons why humans may study sheep hearts.
Homework: Complete lab questions
(gulp)�But pigs have nice hearts…
Pre-Lab Activities/Questions:
1) Briefly describe the two loop system of blood
flow through the heart.
2) Label the structures in the heart below.
Supplies you will use:
Scalpel Blade
Scalpel Handle
Surgical Scissors
Hemostats
Dissection Tray & Sheep Heart
Don’t forget your gloves!
Slide blade on scalpel handle.
Peel back blade packet halfway. Slide over narrow tip of scalpel handle.
Scalpel is now ready for dissection.
Exterior Anatomy of the Heart
Base
Apex
Auricles
Rt.
Lt.
Ear-shaped extensions of the atria.
The auricles 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.
Lt. common carotid
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
Pulmonary veins are inferior to pulmonary arteries.
Rt.
Lt.
Rt.
Pulmonary Vein
Lt.
Pulmonary Vein
Interior Anatomy of the Heart
Dissect heart on the coronal plane.
Open heart on dissection tray.
Posterior half
Anterior half
Rt.
Lt.
Septum
Lt. Atrium
Rt. Atrium
aorta
Rt.
Lt.
Rt. Ventricle
Lt. Ventricle
Septum
aorta
Width of right ventricular wall
Width of left ventricular wall
Chordae tendinae
Tricuspid valve
Cusp of valve
Papillary muscles
Septum
Mitral valve
Septum
Septum
cusp
Chordae tendinae
Chordae tendinae
Check points--Exterior Heart
Students should be able to point out:
Check points--Interior Heart
Students should be able to point out:
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)
That’s All folks!
…and don’t forget
to clean up.
Exit Pass: What parts of the scientific method did you perform well today? How?
Above & Beyond:
Develop a pod cast for your answer to question # 2 which asked you to pretend you are a red blood cell. Explain in words your way through the cardiovascular system starting at the superior vena cava, delivering oxygen to the brain, and then returning to the vena cava. Make sure to list the important veins, arteries, atria, ventricles, valves, etc. that you will come into contact with as you make your journey.