vitale 4 Flashcards
the coronary sinus
it collects almost all venous blood return
where do we expect the coronary sinus to open?
into the right atrium
which venous openings do we expect to find in the right atrium?
superior vena cava
inferior vena cava
coronary sinus
the great cardiac vein runs parallel to which artery in the posterior aspect of the heart?
parallel to the circumflex artery
the great cardiac vein continues posteriorly with?
the coronary sinus
the great cardiac vein collects blood of?
both left and right ventricle
veins that the Coronary sinus receive
posterior left ventricular vein and middle cardiac vein
small cardiac vein
great cardiac vein
the small cardiac vein runs parallel to?
the right coronary artery.
it is the right affluent to the coronary sinus
what are the veins that collect venous blood from the right ventricle?
great cardiac vein
small cardiac vein
the small veins of the right atrium are not collected by the coronary sinus. why?
because the right atrium is the terminal destination of the venous blood. it would make no sense to terminate into the coronary sinus and then go back to the right atrium. their final destination is the right atrium.
the right atrium collects venus blood from the ventricles and the left atrium through?
the coronary sinus
name of the valve between the pulmonary trunk and the right ventricle
semilunar pulmonary valve
name of the valve between the right atrium and right ventricle
tricuspid valve
name of the valve between left atrium and left ventricle
bicuspid or mitralic
name of the valve between left ventricle and aorta
semilunar aortic valve
the time between the first and second tone is the time of?
the systolic phase
the time between the second tone and the subsequent first tone corresponds to?
the diastolic phase
the two atrioventricular valves close together at the beginning of?
the systolic phase
the two semilunar valve close together at the beginning of?
the diastolic phase
which one is quicker between systolic and diastolic? why?
systolic phase
it takes more time to fill the ventricles from the atria than to squeeze the ventricles and fill the respective arteries
why does the inter atrial septum must remain incomplete until birth?
because oxygenated blood reaches the right atrium in the fetal circulation and then it moves into the left atrium: the septum would not allow this communication
what’s the embryological origin of the aorta and the pulmonary artery?
they both originate from the truncus arteriosus
Composition of the interventricular septum
lower 2/3 comes from the real interventricular septum, muscular in nature
upper 1/3 from the septum of the truncus arteriosus that descends into the ventricle cavity completing their separation–>fibrous in nature
FIBROUS PORTION OF THE INTER VENTRICULAR SEPTUM
why after birth the pressure in the left atrium increases? what is the consequence?
the pressure in the left atrium increases after birth because lungs start to work and the pulmonary veins start to bring oxygenated blood to the left atrium.
the septum primum and the septum secondum impinge against eachother closing the foramen ovale. subsequently they will fuse together to form the real strong inter atrial septum.
