Pulmonary Trunk. Right Ventricle. Left Atrium. Brachiocephalic Artery. **Anterior
view— notice all arteries are in the front. Left Ventricle. Aortic Arch.
Cow Heart Dissection
Brachiocephalic Artery
Pulmonary Trunk
Right Ventricle Left Atrium Aortic Arch
Interventricular Groove
Left Ventricle
**Anterior view— notice all arteries are in the front
• Same anterior view with aortic arch moved to the proper side. • See if you can identify the aortic arch, brachiocephalic artery, pulmonary trunk, left and right ventricles, interventricular groove, and the left atrium.
• Probe going into Brachiocephalic Artery branching off aortic arch • Where is the blood coming from when it goes into the aorta?
• Probe going into Brachiocephalic Artery branching off aortic arch • Where is the blood coming from when it goes into the aorta? – Left ventricle through pulmonary semilunar valve
• Probe identifying pulmonary trunk that will branch into pulmonary arteries. • Where is blood entering the pulmonary trunk coming from? • Where is it going?
• Pronbe identifying pulmonary trunk that will branch into pulmonary arteries. • Where is blood entering the pulmonary trunk coming from? – Right ventricle coming through aortic semilunar valve
• Where is it going? – Lungs!!
Superior/Inferior Vena Cava
Right atrium Pulmonary veins coming in to left atrium—cut through Right Ventricle
Left Ventricle
**Posterior view— notice veins all come in in back
• Another view of the superior and inferior vena cava
• Another view of the vena cava leading to the right atrium
**Interior of Right Ventricle Pulmonary trunk White sheet of endocardium
Right A-V valve, or TRICUSPID valve—can just slightly see chordae tendinae
Moderator band
Probe under chordae tendinae of tricuspid valve
Moderator Band
Probe through myocardium of Right Ventricle
Left atrium—cut through Bicuspid, left A-V, or mitral valve—cut through but can see cusps (flaps)
Chordae Tendinae
Coronary vessel
**Interior of Left Ventricle
Left Atrium One cusp of biscuspid valve Chordae tendinae attached to flap to keep it from going backward into atrium
Papillary muscles anchoring chordae tendinae
Probe going through aortic semilunar valve
Where will the probe go? Where does blood go after the left ventricle?
Probe going through aortic semilunar valve
Where will the probe go? Where does blood go after the left ventricle?
•To the aorta then to the body!!
Cusp of bicuspid valve
• Another picture of the probe going through the aortic semilunar valve. – Notice that the semilunar valve is behind the cusp. It leads to the aorta which is medial to the atrium. The aorta comes out of the middle of the base.
Myocardium
Wooden probe in interventricular septum
Right ventricle
Left ventricle
• Compare myocardium of right and left ventricles—can distinguish the two by this factor alone because one is much thicker. • Which is thicker? Why?
Right ventricle
Left ventricle
• Compare myocardium of right and left ventricles—can distinguish the two by this factor alone because one is much thicker. • Which is thicker? Why? – The left ventricle myocardium is much thicker because it must pump blood to the whole body, not just the lungs.
Cusp of bicuspid valve
Chordae Tendinae
Papillary muscles anchoring chordae tendinae
The End Good Luck Studying! Be sure you know the cycle of how blood flows!
