chapter 15 Flashcards
valve between the right atrium and right ventricle
tricuspid valve
valve between the left atrium and right ventricle
bicuspid/mitral valve
chamber that pumps blood to the lungs
right ventricle
chamber that pumps blood into the aorta
left ventricle
chamber that receives oxygenated blood from lungs
left atrium
chamber that receives deoxygenated blood from the body
aortic valve
valve between the right ventricle and pulmonary trunk
pulmonary valve
valve between the left ventricle and aorta
aortic valve
pericardium
membrane that surrounds and protects the heart
superior vena cava
blood vessel that delivers deoxygenated blood from the head and neck to the heart
“pacemaker”
sinoatrial (SA) node
Arteriees and veins arise from this portion of thee heart
base
This ventrical pumps blood to the lungs
right ventricle
heart attack
myocardial infarction
P wave represents this event
atrial depolarization followed by systole
the first heart sound ( lubb ) us caused by closure of these valves.
AV valve
parts of the pericardium
fibrous and serous
outermost layer of pericardium
fibrous
layer of the pericardium adjacent to the heart muscle
viceral
when the atria are in systole the ventricles are in
diastole
when the ventricles are in systole the AV valves are
closed
heart valves
prevent the backflow of blood
the T wave
repolarization
venous blood (without oxygen) from the body returns to this chamber
right atrium
hardening of the arteries
arthersclerosis
condition caused by reduced blood flow to the myocardium
myocardial ischemiec
irregular heart rhythm
arrhythmia
opening in the septum between the atria and fetus
foramen ovale
narrowing of a valve opening by scar tissue
stenosis
different areas of the heart beating independently
fibrillation
narrowing of the coronary arteries reducing blood flow to the heart; has a number of causes and is the leading cause of death in the us
coronary artery disease
the term epicardium refers to this structure
over the heart wall
circulation of the blood through the heart muscle is supplied by the …..
coronary cirulation
cardiac muscle is known as
myocardium
thickest wall of the heart chamber
left ventricle
the heart beat originates in this mass of tissue
SA node
structure whose job is to sequence the ventricular contractiions with the atrial contractions
AV node
the electrical conducting system in the outer walls of the ventricles
conduction of myofibers (perkingie fibers)
location of the SA node of the heart
right atrium
the QRS spike represents this event
ventricular contraction
the second heart sound (dupp) is caused by this
closing semilunar valves
heart rate is monitored and regulated by this structure
cardiovascular center of medulla
nerve that decreases the heart rate
vagus
the heart speeds up when we stand up quickly due to receptors here that detect blood pressure changes
corotid artery
cardiac cycle
relaxation
artial systole
ventricular systole
coronary arteries branch off of the
aorta
the action of _____ causes audible heart sounds
valves
improperly closing valves
cause heart murmurs
the period of relaxation in the cardiac cycle
diastole
a heart that is stretched just before contraction will contract stronger according to this law
degree of stretch Frank - Starling
the contraction phase of the heart
systole
the good chemicals that take cholesterol to liver are
high density lipo protiens (HDL’s)
what causes the semilunar valves to close
drop in blood pressure
the volume of blood ejected from each ventricle with one contraction of the heart
70ML
the amount of blood ejected by each ventricle each minute
cardiac output
the term describing heart chamber contraction is ____.
systole
name several chemicals which would act to slow the heart rate
Ca+2 Na+1 and K+1
the term describing heart chamber relaxation is
diastole
chest pain caused from ischemia
angina pectoris
inflammation of the heart covering
pericarditis
