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33 Cards in this Set
- Front
- Back
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paracardium
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membrane that covers the heart like a bag
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Pericardial Cavity
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contains fluid for the heart to float in, reducing myocardium
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Epicardium
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outer layer
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Myocardium
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middle layer
MOSTLY smooth muscle |
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Septum
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wall that divides the heart in half and separates the oxygenated blood from the deoxygenated blood
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Mitral valve
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prevent blood from flowing backwards
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AV (Atrioventriculuar) Valve
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2 different types: tricuspid and dicuspid
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Tricuspid valve
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found between the right atrium and right ventricle
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Bicuspid (mitral) Valve
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found between the left atrium and ventricle
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Semilunar Valves
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2 types:
Pulmonary and Aortic |
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Pulmonary Valve
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between the right ventricle and the pulmonary artery
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Aortic Valve
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between the left ventricle and the aorta
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SA (Sinoatrial Node)
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bundle of specialized muscle cells that create an electrical impulse that causes the heart to beat
-Nickname "pacemaker" |
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AV (Atriovascular Node)
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located in septum between the atria, it relays the electrical impulse from the SA node to the ventricles
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blood pressure
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force that blood exerts on the wall of a blood vessel
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types of blood pressure
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systolic and diastolic
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Systolic Pressure
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pressure on arteries when ventricle contracts; avg 10-120mm of Hg
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Diastolic Pressure
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pressure when ventricles relax; avg 70-80mm of Hg
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hypertension
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high blood pressure
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arteries
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strong vessels that carry oxygenated blood away from the heart
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aorta
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largest artery; connected to the left ventricle
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coronary arteries
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supply blood to the heart
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Brachiocephalic Arteries
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supplies blood to the tissues of brain
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Common Carotid arteries
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supplies blood to the head and neck
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veins
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thinner vessels that carry deoxygenated blood towards the heart
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pulmonary veins
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returns blood from lungs to heart
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superior and inferior vena cavas
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returns blood from the head and body to the heart
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systemic circulation
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delivers blood to all body cells and carries away waste
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coronary circulation
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delivers food to the heart (itself)
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pulmonary circulation
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eliminates carbon dioxide and oxygenates blood (lung pathway)
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lymph
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excess fluid in the tissues moves into the tiny vessels of the lymphatic system
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lymphatic system
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returns fluids that have collected in the tissues to the blood stream. fluids diffuse through the capillary walls just as oxygen and nutrients do. some fluids pass into cells, some return to capillaries and some remain in he intercellular spaces
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lymph nodes and functions
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lymph nodes are small organs that the lymph's travel through vessels on the way to the heart. They filter the lymph's as they pass, which trap foreign particles, microorganisms, and other tissue debris. Also store lymphocytes.
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