chpt 13: cardiovascular system Flashcards
components of cardiovascular sys
blood, blood vessels, heart
function of heart
transport blood to systemic tissues
how much blood is pumped per min
5L/min
what is the anterior portion of the heart protected by?
sternum and ribs
the diaphragm covers the ___ surface of the heart
inferior
the right and left sides of the hearts are covered by
lungs
r superior projections covers
r atria
L superior protection covers
l atria
r inferior location
5th and 6th costal rib
L inferior location
5th costal ribs
L superior location
2nd costal rib
r.superior location
3rd costal rib
apex of heart =
ventricles
base of heart =
atria
what is fibrous pericardium made of?
dict
fibrous pericardium location
between pericardium and heart cavity
function of fibrous pericardium
- anchors heart to mediastinum
- protection
- prevents over stretching
layers of the heart wall
- epicardium/ visceral
- myocardium
- endocardium/mesothelium
epicardium/ visceral location
-outermost, outer heart lining
epicardium structures
adipose tissues and coronal veins
myocardium structure
cardiac muscles, thickest
myocardium function
pumps blood/ causes contractions
endocardium/ mesothelium location
inside heart, heart walls and bv
heart markings name
sulci
sulci Is made of
-coronary bv and fat
sulci function
-boundary between two chambers
coronal sulus function
-marks the superior atria and inferior ventricles
anterior interventricle sulus location / function
r and L ventricles
posterior interventricle sulus location / function
b/w ventricles on posterior side
right atrium structures
- smooth muscles pectinate muscles line atria wall
- fossa ovalis
- interatrial septum
- tricuspid av valve
which veins does the right atrium receive deoxy blood from?
- inferior and superior vena cava
- coronary sinus
fossa ovalis used to be
forvavem ovale
forvavem ovale function
transport blood from r atria to L ventricle
ventricle structures
- trabeculae carnea
- chordae tendinea
- papillary muscles
trabeculae carnea structures
-rasises bundles of cardiac muscles fibers
chordae tendinea structures
-attached to papillary muscles
papillary muscles function
-secures trabeulare carnea to wall
-trabeculae carnea
-chordae tendinea
-papillary muscles
overall function
regulate opening and closing of AV valves
which ventricle is the thickest and why
Left ventricle, pumps blood to body
Biscuspid/ Mitral valve
lets blood through from L.atria to L.ventricle
left ventricle forms the
apex
av valves function
prevent back flow of blood
semilunar valves function
- allow ejection of blood from the ventricles
- prevent backflow
av valves examples
-mitral/ biscuspid valve and tricuspid valve
semilunar valves examples
-pulmonary valve and aortic valve
3 blood circulation systems
- systemic circulation
- coronary circulation
- pulmonary circulation
left coronary artery’s arteries
- anterior inter ventricular artery
- circumflex artery
anterior inter ventricular artery location
walls of both ventricles and interventricular septum
circumflex artery location
-wall of left atrium and ventricle
right coronary artery’s arteries
marginal artery and post inter ventricular artery
autorythmic cells meaning
- don’t need ni or hormones to transmit contraction n
cardiac conduction sequence
sinoatrial node to atrioventricular node to atrioventricular bundle aka bundle of his to right and left bundle branches to purkinje fibers
what tissue is found in the endocardium of the heart?
epithelial
