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BPK 142 Lecture Notes - Mitral Valve, Chordae Tendineae, Tricuspid Valve

Biomedical Physio & Kines
Course Code
BPK 142
Craig Asmundson

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Cardiovascular System: The Heart
Approximately the size of your fist
Weighs less than a pound
5 Liters of blood is pumped through 60 000 miles of blood vessels per minute
Beats ~100 000 times a day
Superior surface of diaphragm
Left of the midline
Anterior to the vertebral column, posterior to the sternum
Heart Covering
• Protects and anchors heart
• Prevents overfilling
Heart Wall
Epicardium - visceral layer of the serous pericardium
Myocardium – cardiac muscle layer forming the bulk of the heart
Endocardium – lines the heart chambers and continues with endothelial lining of blood vessels
External Heart: Major Vessels of the Heart
Superior & inferior venae cava
Right and left pulmonary veins
Pulmonary trunk (splits into R & L pulmonary arteries)
Ascending aorta (3 branches) – brachiocephalic, carotid, & subclavian arteries
Atria of the Heart
Atria are the receiving chambers of the heart
Each atrium has a protruding auricle
Blood enters right atria from superior & inferior venae cava & coronary sinus
Blood enters left atria from pulmonary veins
Interatrial Septum separate atria
Ventricles of the Heart
Ventricles are the discharging chambers
Papillary muscles & trabeculae muscles mark ventricular walls
Interventricular septum separate ventricles
Right ventricle pumps blood into the pulmonary trunk
Left ventricle pumps blood into the aorta
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