Heart Flashcards
the myocardium of the atria forms what type of muscles?
Pectinate muscles- series of horizontal ridges
what forms the posterior wall of the right atrium?
The interatrial septum
the interatrial spetum contains a shallow shaped depression called..
the fossa ovalis
to where does the coronary sinus open into
the right atrium
what seperates the right atrium and ventricle and what supplies blood to the right atria and ventricle
seperates by atrio ventricular groove (atrioventricular valves)- tricupsid valve
blood supply from right coronary artery
the right and left ventricle wall contain a series of muscular ridges called. difference between ones in right and left
trabeculae carnae. ones in left are more well developed.
describe the connection of the tricuspid valve with the ventricular wall. (2 structures)
chordae tendinae connect the tricuspid valve to the papillary muscles, which are connected with the ventricular wall
3 cusps of tricuspid valve
anterior, posterior and septal
what are the chordae tendinae
connect tricuspid valves to papillary muscles. they are collagenous chords which prevent the cusps from being everted whent the ventricle contracts
the cavity of the right ventricle continues upwards and narrows into a funnel shaped structure called the …. this then reached the pulmonary trunk
pulmonary conus
what seperates the pulmonary conus from the pulmonary trunk?
the pulmonary semilunar valves
where does the left atrium lie
posterior to the right atrium. (behind it) posterior surface o rbase of the heart.
which part of the left atrium is NOT smooth walled
the auricle: has muscular ridges called muculi pectinati
which vessels do NOT have valves
pulmonary veins and vena cavae. there are no valves on veins entering the heart
how many pulmonary veins are there
4, 2 on each side, on top of each other