Chapter 8- Cardiovascular System Flashcards
arteries
blood vessels that pump blood O2, nutrients, and other products to the heart and body
capillaries
smaller vessels off of the arteries that are microscopic
veins
combination of venules
venules
larger blood vessels that are formed by merge of capillaries
leaflets
flat, leaf-shaped structures that comprise the valves of the heart and prevent the backflow of blood
lumen
tubular space or channel within an organ or structure of the body; space within artery, vein, intestine
regurgitation
backflow or ejecting of contents through an opening
sphincters
circular muscles found in a tubular structure or hollow organ that constrict or dilate to regulate passage of substance
vasoconstriction
narrowing of the lumen of a blood vessel that limits blood flow; usually result of diseases and medications
vasodilation
widening of the lumen of a blood vessel caused by the relaxing of the muscles of vascular walls
viscosity
thickness or a measure of how resistant a liquid is to flowing
tunica externa
outer coat, composed of connective tissue that provides strength and flexibility
tunica media
middle layer, composed of smooth muscle; muscle can alter the size of the lumen of vessel and when it contracts it causes vasoconstriction (decrease blood flow); when it relaxes it causes vasodilation (increase in blood flow)
tunica intima
thin, inner lining of the lumen of the vessel, composed of epithelial cells that provide a smooth surface on inside of the vessel
pulse
surge of blood felt in the arteries when blood is pumped from the heart
oxygen
arterial blood (except pulmonary artery) contains high concentration
arterioles
smaller arteries where oxygenated blood travels
valves
small structures within veins that prevent backflow of blood
pericardium
enclosed sac around the heart
endocardium
serous membrane that lines the four chambers of the heart and its valves and is continuous with the endothelium or arteries and veins
myocardium
muscular layer of the heart
epicardium
outermost layer of the heart
right atrium
upper chamber; collect blood
left atrium
upper chamber; collect blood
right ventricle
lower chamber; pump blood
left ventricle
lower chamber; pump blood
RV pump blood
to the lungs (pulmonary circulation) for oxygenation
LV pumps oxygenated blood
to the entire body (systemic circulation)
superior vena cava
collects and carries blood from the upper body
inferior vena cava
collects and carries blood from the lower body
tricuspid valve
RA to this consists of 3 leaflets to RV
left and right pulmonary artery
blood leaves RV to these and travels to the lungs
pulmonic valve (pulmonary semilunar valve
prevents regurgitation of blood into RV from pulmonary artery
mitral (bicuspid) valve
structure consisting of two leaflets blood passes through LV to this
aorta
largest artery of the body; containing the aortic semilunar valve
aortic semilunar valve (aorta valve)
permits blood flow in only one direction-LV to aorta
right coronary artery
vascularize right side of heart
left coronary artery
vascularize left side of heart; divided into two branches: left anterior descending artery and circumflex artery
conduction tissue
specialized cardiac tissue
sinoatrial (SA) node
located in upper portion of RA and possesses own intrinsic rhytm
atrioventricular (AV) node
causes atria to contract
bundle of His (AV bundle)
conduction fibers, relays impulse to purkinje fibers
Purkinje fibers
extended up ventricle wall
pacemaker
aka SA node
electrocardiograph
impulses recorded on graph paper through this instrument
P wave
depolarization (contraction) of the atria
QRS complex
depolarization (contraction) of the ventricles
T wave
repolarization (recovery) of the ventricles
systole
contraction phase when blood is forced out of the heart
diastole
relaxation when ventricles fill up with blood
sphygmomanometer
measures BP
aneurysm/o
aneurysm (widening blood vessel)
angi/o
vessel (usually blood or lymph)
vascul/o
vessel (usually blood or lymph)
aort/o
aorta
arteri/o
artery
arteriol/o
arteriole
atri/o
atrium
ather/o
fatty plaque
cardi/o
heart
coron/o
heart
electr/o
electricy
embol/o
embolus (plug)
hemangi/o
blood vessel
my/o
muscle
phleb/o
vein
ven/o
vein
scler/o
hardening; sclera (white eye)
sept/o
septum
sphygm/o
pulse
sten/o
narrowing, stricture
thromb/o
blood clot
valv/o
valve
valvul/o
valve
ventricul/o
ventricle (of heart of brain)
-cardia
heart condition
-stenosis
narrowing stricture
brady-
slow
endo-
in, within
extra-
outside
peri-
around
trans-
across
cardiologist
diagnosis, treatment, and management of cardiovascular disorders
cardiology
medical specialty concerned with disorders of cardiovascular diseases
arteriosclerosis
progressive degenerative disease of arterial walls that cause them to become thickened and brittle restricting the flow of blood to tissues and organs
atheroma
plaque like substance composed of cholesterol, lipids, and cellular debris
thrombus
formation of a clot that travel though vascular system
infarction
localized tissue death
ischemia
localized tissue anemia
angina
chest pain and tightness