biol 204 week 3 lab dissection and anatomy of the heart
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BIOL 204 Week 3 Lab
Dissection and
Anatomy of the Heart
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Objective 1 Human Heart Anatomy
The heart has an apex and a base:
Base
Apex
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The heart is surrounded by a pericardium:
Human Heart In the Thorax Pericardial Sac Cut Open
Surrounded by the pericardium
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The wall of the heart consists of three tissue layers:
1. Epicardium (visceral pericardium)
2. Myocardium
3. Endocardium
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Structures Visible On the Anterior Surface/Associated Vessels:
Superior Vena Cava
Right Pulmonary Veins
Right Auricle
Pulmonary Trunk
Inferior Vena Cava
Aortic Arch
Left Pulmonary Veins
Left Auricle
Anterior Interventricular Sulcus
Brachiocephalic Left Common Left Subclavian Artery Carotid Artery Artery
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Structures Visible on The Posterior Surface:
Aorta
Pulmonary Veins
Coronary Sinus
Superior Vena Cava
Pulmonary Arteries
Inferior Vena Cava
Posterior Interventricular Sulcus
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The Heart Has Four Chambers:
Interatrial Septum: lies between the atria
Interventricular Septum: lies between the ventricles
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Internal Structures of the Heart
Pectinate Muscle
Fossa Ovalis
Tricuspid Valve
Chordae Tendineae
Papillary Muscles
Bicuspid Valve
Semilunar Valves
Trabeculae Carneae
Interventricular Septum
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These two Structures of the Adult Heart Are Remnants of Fetal Circulation:
Ligamentum Arteriosum
Fossa Ovalis
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The heart receives its own branch of systemic circulation – there vessels collectively are called coronary circulation
Arteries Veins
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A Sectioned Preserved Human Heart:
1. Interatrial septum
2. Right atrium
3. Left atrium
4. Interventricular septum’
5. Right ventricle
6. Left ventricle
9. Pulmonary trunk
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Sheep’s Heart Dissection:
note the thickness of the right ventricular and left ventricular walls
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Cardiac Muscle in found in the myocardium: