Location of the Heart
in thorax between the lungs in the inferior mediastinum
superficial double-layered serous membrane that surrounds the heart
Two layers of the hert serous membrane
visceral pericardium (epicardium), parietal pericardium
outside layer that lines the inner surface of the fibrous pericardium
fills the space between the layers of pericardium
outermost connective tissue layer of the heart
inner lining of the heart
interventricular septum, interatrial septum
Atrioventricular (AV) valves
between atria and ventricles
AV Valves anchored in place by...
Bicuspid (mitral) valve
left side of heart
right side of heart
Semilunar Valves' Location
between ventricle and artery
2 Types of Semilunar Valves
branch from the aorta to supply the heart muscle with oxygenated blood
drain the myocardium of blood
large vein on the posterior of the heart, receives blood from cardiac veins
Blood empties into the right atrium via the...
Sinoatrial (SA) node
pacemaker; in right atrium
Atrioventricular (AV) node
at the junction of the atria and ventricles
in the interventricular septum
spread within the ventricle wall muscles
rapid heart rate over 100 beats per minute
slow heart rate less than 60 beats per minutes
Cardiac Output (CO)
amount of blood pumped by each ventricle of the heart in one minute
Stroke Volume (SV)
volume of blood pumped by each ventricle in one contraction (each heartbeat)
Typical Heart Rate
75 beats per minute
The Vascular System
Arteries, Arterioles, Capillary beds, Venules, Blood Vessels
Three Tunic Layers
intima, media, extrena
smooth muscle, controlled by sympathetic nervous system
mostly fibrous connective tissue
vessel directly connecting an arteriole to a venule
pressure at the peak of ventricular contraction
pressure when ventricles relax
Factors Effecting BP
age, weight, time of day, exercise, body position, emotional state
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