Heart Anatomy & Basic Function (1) Cardiovascular Function ...
Cardiovascular System Anatomy of the Heart
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Transcript of Cardiovascular System Anatomy of the Heart
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Cardiovascular SystemAnatomy of the Heart
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•The Cardiovascular system is comprised of the heart, blood vessels, & blood
•The heart acts as a “pump”, creating pressure which causes blood to move through the blood vessels of the body, allowing O2 & nutrients to be distributed to, & wastes removed from, body tissues
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Heart Anatomy Overview
Play Heart Anatomy video
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Anatomical Features of the Heart•The heart lies within the
mediastinum of the thoracic cavity
•Hollow muscular organ with four internal chambers▫(2) atria (lt. atrium & rt. atrium)-
receive blood from veins▫(2) ventricles (lt. ventricle & rt.
ventricle)- pump blood into arteries
Superior aspect of heart is the “base”, where the blood vessels attach; Inferior is the “apex”, which rests on the relaxed diaphragm
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Pericardium• The heart lies enclosed within pericardial
membranes▫Fibrous pericardium (pericardial sac) – outer
layer of dense CT that protects & anchors▫Serous pericardium – double layered membrane
with “pericardial fluid” between Parietal pericardium – lines the pericardial sac Visceral pericardium – covers the heart; also known as the
“epicardium”
etalcardium
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Layers of Heart Wall Epicardium (a.k.a. visceral pericardium) Myocardium Endocardium
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External Features Auricles Coronary sulcus – contains the coronary sinus (vein) Anterior interventricular sulcus – contains coronary vessels (artery & vein) Posterior interventricular sulcus – contains coronary vessels (artery & vein)
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Rt Atrium
Lt Atrium
Pectinate muscles
Interatrial septum
SVC
IVC
Coronary sinus (opening)
Pulmonary veins
Tricuspid valve
Bicuspid (mitral) valve
Chordae tendineaePapillary muscle
Chordae tendineae
Papillary muscle
Deoxygenated blood
Oxygenated blood
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Atrioventricular (AV) valves Tricuspid Bicuspid
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Rt ventricle
Lt ventricle
Interventricular septum
Trabeculae carneae
Aorta
Aortic semilunar valve
Brachiocephalic trunk
Lt. common carotid artery artery Lt. subclavian
artery
Ligamentum arteriosum
Pulmonary semilunar valve
Pulmonary trunk
Pulmonary arteries
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Anatomy
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Coronary Circulation Myocardium receives oxygenated blood from the left & right Coronary arteries – branches off the ascending aorta Deoxygenated blood is drained through Cardiac veins, which all eventually merge into the coronary sinus
Fig. 12.7