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29 Cards in this Set
- Front
- Back
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Cardiovascular Functions
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pumping system to supply all body tissues with O2 and nutrients and to transport cell waste for removal
Role in immune system |
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double walled sac around the heart
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Pericardium
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between the layers for lubrication
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Pericardial fluid
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3 layers
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epicardium, myocardium-thickest and is made of muscle, supplied by coronary arteries and veins; endocardium-inner liing of heart, only part that touches blood
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upper 2, receive blood
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Atria
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divides chambers
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Septum
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2 lower chambers, pump blood out
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Ventricles
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tip of the heart
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Cardiac apex
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control blood flow
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Valves
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betw. R atrium and R ventricle
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Tricuspid
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betw. R ventricle and pulmonary artery
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Pulmonary semilunar valve
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bicuspid valve, betw. L atrium and L ventricle
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Mitral valve
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betw. L vent. and the aorta
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Aortic semilunar valve
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includes blood flow to all parts of the body except lungs
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Systemic circulation
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Systemic circulation, O2
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O2 rich blood flows out of the heart from L vent. into art. circ.
O2 poor blood returns blood to the R atrium thru the veins |
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Pulmonary Circ.
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-flows betw. heart and lungs
-Flows from R vent. thru the pulmonary art. to the lungs -In the lungs, waste material from body is exchanged for 02 -Pulnonary veins carry the O2 rich blood from the L atr. |
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Heartbeat
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-Rate and regularity of the HB is determined by elect. impulses from nerves that stim. the myocardium of the heart (Conduction Sys.)
-These elect. impulses are controlled by the SA (Sinoatrial) node, AV (atrioventricular) node, and Bundle of His |
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SA Node
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-found in the post. wall of R atr.
-starts basic rhythm of the HB, called the pacemaker -start each wave of muscle contrac. of the heart, forcing blood into the vent. Impulse spread over to L atr. so they will contract in unison |
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AV Node
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-located at the floor of the R atr., near the interatrial septum
-Transmits the impulses onto the Bundle of His |
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Bundle of His
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-loc. in the intervent. septum
-carry the impulse to the R and L vent. and the Purkinje fibers, causing the vent. to contract in unison and forcing blood into the pulmonary art. and the aorta |
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1st caused by the closing of the tricuspid and mitral valves
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Lubb sound
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shorter and higher pitched, caused by the clowing of the semilunar valves in the aorta and the pulmonary art. as blood exits the heart
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Dupp sound
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Pulmonary Circ.
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-flows betw. heart and lungs
-Flows from R vent. thru the pulmonary art. to the lungs -In the lungs, waste material from body is exchanged for 02 -Pulnonary veins carry the O2 rich blood from the L atr. |
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Heartbeat
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-Rate and regularity of the HB is determined by elect. impulses from nerves that stim. the myocardium of the heart (Conduction Sys.)
-These elect. impulses are controlled by the SA (Sinoatrial) node, AV (atrioventricular) node, and Bundle of His |
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SA Node
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-found in the post. wall of R atr.
-starts basic rhythm of the HB, called the pacemaker -start each wave of muscle contrac. of the heart, forcing blood into the vent. Impulse spread over to L atr. so they will contract in unison |
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AV Node
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-located at the floor of the R atr., near the interatrial septum
-Transmits the impulses onto the Bundle of His |
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Bundle of His
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-loc. in the intervent. septum
-carry the impulse to the R and L vent. and the Purkinje fibers, causing the vent. to contract in unison and forcing blood into the pulmonary art. and the aorta |
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1st caused by the closing of the tricuspid and mitral valves
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Lubb sound
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shorter and higher pitched, caused by the clowing of the semilunar valves in the aorta and the pulmonary art. as blood exits the heart
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Dupp sound
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