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Cardiovascular system function
- pumps and transports blood throughout the body.
- consists of the heart and a closed network of blood vessels conposed of arteries, capillaries and veins
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heart
- muscular cone-shaped organ the size of a fist.
- located behind the sternum and between the lungs
- consists of two upper chambers (atria) and two lower chambers (ventricles)
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atrium
- one of two upper chambers in the heart - right and left
- receive blood returning from the body through the veins.
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ventricle
- one of two lower chambers in the heart - right and left
- pump blood through the arteries from the heart back to the body tissue
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atrial septum
separates atria
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ventricular septum
separates the ventricles
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tricuspid valve
- one of the atrioventricular valves
- located between the right atrium and right ventricle
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mitral valve
- one the atrioventricular valves
- located between the left atrium and the left ventricle
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semilunar valves
pulmonary and aortic valves located between the the right ventricle and the pulmonary artery and between the left ventricle and the aorta
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pericardium
two-layer sac consisting of an external fibrous layer and an internal serous layer
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epicardium
- serous inner layer of the pericardium
- secretes a fluid that facilitates movement of the heart
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epicardium
covers the heart
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myocardium
middle, thick, muscular layer
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endocardium
inner lining of the heart
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blood vessels
tubelike structures that carry blood throughout the body
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arteries
- carry blood away from the heart
- carry oxygen and other nutrients from the heart to the body cells (with the exception of the pulmonary artery)
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pulmonary artery
carries carbon dioxide and other waste products from the heart to the lungs
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arterioles
smallest arteries
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aorta
- largest artery in the body
- originating at the left ventricle and descending through the thorax and abdomen
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veins
- carry blood back to the heart
- carry blood containing carbon dioxide and other waste products (with the exception of the pulmonary veins)
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pulmonary veins
carry oxygenated blood from the lungs to the heart
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venae cavae
largest veins in the body
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inferior vena cava
carriesblood to the heart from body parts below the diaphragm
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superior vena cava
carries blood to the heart from the upper part of the body
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capillaries
- connect arterioles with venules
- conduct exchange of waste and nutrients through capillary walls
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blood
composed of plasma and formed elements
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plasma
- clear, straw-colored, liquid portion of blood in which cells are suspended.
- approx. 90% water
- comprises approx. 55% total blood volume
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erythrocytes
- red blood cells that carry oxygen
- develop in bone marrow
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leukocytes
white blood cells that combat infection and respond to inflammation
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platelets (thrombocytes)
- aid in clotting
- one of the formed elements in blood
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serum
clear, watery fluid portion of the blood that remains after a clot has formed
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lymph
- transparent, colorless, tissue fluid
- contains lymphocytes and monocytes
- flows in a one-way direction to the heart
- similar to blood plasma
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lymphatic vessels
- similar to veins
- transport lymph from body tissues to chest to enter cardiovascular system
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lymph nodes
- small, spherical bodies composed of lymphoid tissue
- filter lymph to keep substances (bacteria, etc) from entering blood
- produce lymphocytes
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spleen
- located in left side of abdominal cavity between stomach and diaphragm
- largest lymphatic organ in adult body
- blood (not lymph) is cleansed of microorganisms in spleen
- stores red blood cells and destroys worn out red blood cells
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thymus gland
- located anterior to the ascending aorta and posterior to the sternum between the lungs
- develops body's immune system from infancy to puberty
- atrophies around puberty so that most of gland becomes connective tissues
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angi/o
- vessel
- usually used to refer to blood vessel
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lymph/o
lymph, lymph tissue
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ather/o
yellowish, fatty plaque
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electr/o
electricity, electrical activity
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isch/o
deficiency, blockage
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-graph
instrument used to record; record
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aneurysm
balloning of a weakend portion of an arterial wall
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myocardial infarction
heart attack
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anemia
reduction in the amount of hemoglobin in the red blood cells. Can be caused by blood loss or decrease in production or increase in destruction of red blood cells
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hemophilia
inherited bleeding disease most commonly caused by a deficiency of the coagulation factor VIII
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leukemia
malignant disease characterized by excessive increase in abnormal white blood cells formed in bone marrow
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cardiac pacemaker
battery-powered apparatus implanted under the skin with leads placed on the heart or in the chamber of the heart
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coronary artery bypass graft (CABG)
surgical technique to bring a new blood supply to heart muscle by detouring around blocked arteries
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femoropopliteal bypass
- probably a spelling word
- surgery to establish an alternate route from femoral artery to popliteal artery to bypass an obstruction
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intracoronary thrombolytic therapy
injection of an intrevenous medication to dissolve clood clots in coronary vessles
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Doppler ultrasound
- study that uses sound for detection of blood flow within vessels
- used to assess intermittent claudication, deep vein thrombosis and other blood flow abnormalities
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exercise stress test
study that evaluates cardiac function during physical stress by riding a bike or walking on a treadmill.
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cardiac catheterization
- examination to determine the condition of the heart and surrounding blood vessels
- also called coronary angiography
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auscultation
hearing sounds within the body through a stethoscope
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blood pressure
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- pressure exerted by the blood against the blood vessel walls
- written as: systolic / diastolic
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sphygmomanometer
- probably a spelling word
- device used for measuring blood pressure
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coagulation time
blood test to determine the time it takes for blood to form a clot
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prothrombin time
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- blood test used to determine certain coagulation activity defects and to monitor anticoagulation theraphy for patients taking Coumadin
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HDL
High density lipoprotein
good cholestorol
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LDL
Low density lipoprotein
bad cholestorol
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cardiopulmonary resuscitation
- CPR
- emergency procedure consisting of artifical ventilation and external cardiac massage
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diastole
- lower # on BP
- phase in the cardiac cycle in which the ventricles relax between contractions
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hypertension
- high blood pressure
- above 140/90
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hypotension
- low blood pressure
- below 90/60
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lumen
space within a tubular part or organ, such as the space within a blood vessel
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systole
- upper # on BP
- phase in the cardiac cycle in which the ventricles contract
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anticoagulant
agent that slows the clotting process
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phagocytosis
process in which some of the white blood cells destroy the invading microorganism and old cells
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vaccine
suspension on inactivated microorganisms administered by injection, mouth or by nasal spray to prevent infectious diseases by inducing immunity
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