(gulp)But sheep have nice

hearts…

BaseBase

ApeApexx

AuriclesAuricles

Rt.

Lt.

Ear-Ear-shaped shaped

extensionextension

s of thes of the atria.atria.

The auricles wrap around The auricles wrap around to the to the anterioranterior side of the side of the heart.heart.

Anterior

The Coronary The Coronary VesselsVessels

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.

AnterioAnterior Viewr View

The Great VesselsThe Great VesselsThe 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.

Locating the Locating the great great

vessels:vessels:

Locating the Locating the great great

vessels:vessels:

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.

Anterior View--Aortic Anterior View--Aortic ArchArch

Brachiocephalic Brachiocephalic trunk (innominate trunk (innominate

artery)artery)

Rt.

Lt.

Lt. Lt. common common carotidcarotid

Aorta: Posterior View

AortaAorta

LtLt..

RtRt..

Posterior View--Vena Cavae

Superior Superior Vena Vena CavaCavaInferior Inferior

Vena Vena CavaCava

Lt.

Rt.

Posterior View--Pulmonary Artery

Lt. Lt. Pulmonary Pulmonary

ArteryArtery

Lt.

Rt.

Posterior View--Pulmonary Posterior View--Pulmonary VeinsVeins

Pulmonary veins are inferior to pulmonary Pulmonary veins are inferior to pulmonary arteriesarteries..

RtRt..

LtLt..

Rt.

Pulmonary VeinLt.

Pulmonary Vein

Dissect heart on the coronal plane.Dissect heart on the coronal plane.

Open heart Open heart on on

dissection dissection tray.tray.

Posterior half

Anterior half

Rt.

Lt.

Sep

tum

Lt. AtriumRt.

Atrium

aort

a

RtRt..

Lt.Lt.

Rt. Ventricle

Lt. Ventricle

Sep

tum

aort

a

Width of right

ventricular wall

Width of left

ventricular wall

Chordae

tendinae

Tricuspid valve

Cusp of valve

Papillary

muscles

Septu

m

Mitral valve

Septu

m

Septu

m

cusp

Chordae

tendinae

Chordae

tendinae

Check points--Exterior HeartCheck points--Exterior Heart

You should be able to point out:You should be able to point out:

•ApexApex & & BaseBase of heart of heart

•Anatomical Anatomical RightRight & & Left SidesLeft Sides of heartof heart

•AnteriorAnterior & & Posterior SidesPosterior Sides of of heartheart

•AuriclesAuricles

•Coronary VesselsCoronary Vessels

Check points--Interior HeartCheck points--Interior Heart

You should be able to point out:You should be able to point out:

•SeptumSeptum

•AtriaAtria & & VentriclesVentricles

•Tricuspid ValveTricuspid Valve, , Pulmonary Pulmonary ValveValve

•MitralMitral ValveValve, , Aortic ValveAortic Valve

•Chordae TendinaeChordae Tendinae

•Papillary MusclesPapillary Muscles

Final Check pointFinal Check point

You should be able to trace pathway of You should be able to trace pathway of blood through great vessels and heart.blood through great vessels and heart.

(begin with vena cava and end with vena cava)(begin with vena cava and end with vena cava)

That’s All folks!…and don’t forget

to clean up.