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26 Cards in this Set
- Front
- Back
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Circulatory System
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Capillaries do the work of the circulatory system
Capillaries are where all exchange takes place Closed system - blood goes back to the heart withno blood lost |
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Heart
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4 chambers
Atria ( also called auricles) Ventricles Right side has deoxygenated blood Left side has oxygenated blood Apex - inferior part of the heart |
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Heart
Atria |
Filling chambers
Right atrium receives deoxygenated blood from the body Left atrium receives oxygenated blood from the lungs |
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Heart
Ventricles |
Pumping chambers
Right ventricle pumps deoxygenated blood to the lungs Left ventricle pumps oxygenated blood to the body |
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heart
Apex |
Inferior part of the heart
Part of the left ventricle Thickest wall - most muscle because it has to pump blood to the entire body |
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Circulatory System
|
Capillaries do the work of the circulatory system
Capillaries are where all exchange takes place Closed system - blood goes back to the heart withno blood lost |
|
|
Heart
|
4 chambers
Atria ( also called auricles) Ventricles Right side has deoxygenated blood Left side has oxygenated blood Apex - inferior part of the heart |
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Heart
Atria |
Filling chambers
Right atrium receives deoxygenated blood from the body Left atrium receives oxygenated blood from the lungs |
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Heart
Ventricles |
Pumping chambers
Right ventricle pumps deoxygenated blood to the lungs Left ventricle pumps oxygenated blood to the body |
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heart
Apex |
Inferior part of the heart
Part of the left ventricle Thickest wall - most muscle because it has to pump blood to the entire body |
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heart
right Side |
Major vessels are inferior and superior vena cava
Inferior vena cava - brings deoxygenated blood from the lower extremities Superior vena cava brings deoxygenated blood from the upper extremities, and head, neck, and brain Both veins bring blood to the right atrium On model, veins are in blue coronary sinus? Right atrioventricular (A-V) or tricuspid valve |
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Heart
Tricuspid Valve |
Rgith side of heart
Between atrium and ventricle Has 3 cusps or leaflets Chordae tendinae Papillary muscless attach valve to the myocardium |
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Veins
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Have no smooth muscle
Arteries have smooth muscle in their walls because need to pump blood |
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Foramen ovale
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In the fetus there is a hole between the right and left atria called the foramen ovale
At birth, this hole usually closes When it closes, it leaves a dpression called the fossa ovalis - this is remnant of fetal circulation |
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Heart
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In the thorax
In the mediastinum Lies in the pericardial cavity |
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Heart
Pericardium |
Parietal pericardium
Visceral pericardium |
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Heart
Layers |
Endocardium - inner layer ? lined by endothelium which is continuous with blood vessels
Myocardium - middle layer (muscle) Epicardium - outer layer Pericardium |
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Heart
Pulmonary Vessels |
Pulmonary arteries carry deoxygenated blood away from the the right ventricle to the lungs
Pulmonary artery is the only artery that carries deoxygenated blood Appears blue in the models because it has no oxygen; all other arteries are red Valve is the semilunar valve or pulmonary valve - prevents backflow into the right ventricle Pulmonary veins bring oxygenated blood to the left atrium from the lungs Pulmonary veins are the only veins with oxygenated blood - appears red on the models |
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Pulmonary vessels
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Also called the Pulmonary trunk
Gas exchange occurs in the lungs - vessels give off CO2 to the lungs and pick up O2 Gas exchange is done by simple diffusion |
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Heart
left Side |
Left atrium receives oxygenated blood from the pulmonary veins
Bicuspid (mitral) valve is between the left atrium and left ventricle Left side pressure of heart is much higher than the right side Blood leaves the left ventricle by the aorta |
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Heart
Mitral Valve |
Between the right atrium and ventricle
Has 2 leaflets or cusps Has chordae tendinae, and papillary muscle attaching it to the myocardium - same as tricuspid valve |
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Heart
Aorta |
Aortic valve is semilunar like the pulmonary valve
Valve is anchored to the vessel wall Aorta pumps oxygenated blood to the entire body The right and left coronary arteries come off the aorta and go to the coronary circulation which supplies blood to the heart |
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heart
Coronary Circulation |
CCoronary arteries come off the aorta
First place that gets oxygenated blood If there is a clot in the coronary arteries and it blocks blood flow, you get a heart attack |
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Aorta
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Branches come off the aorta to supply major areas of the body
Ascending aorta has brachiocephalic trunk,right subclavian, left subclavian Descending aorta see pic |
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Fetal Circulation
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Ductus arteriosus
ligamentum arteriosum see book |
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Heart
Conduction system |
Electrical impulses that control the beating of the heart
Controls contractions, blood pressure, and heart rate SA node - normal pacemaker of the heart; keeps a normal sinus rhythm SA node is located at the top of the atrium across both atria A-V node - AV Bundle of His Purkinje system |
