Heart Flashcards
layers of the heart
myocardium
epicardium
endocardium
myocardium
muscle layer of the heart
epicardium
serous pericardium covering the external surface of the heart
endocardium
lining of the heart chambers
similar to and continuous with the tunica intima of the blood vessels
diaphragmatic surface of the heart
inferior surface that rests on the diaphragm
mostly left ventricle
atrioventricular/coronary sulcus
groove around the heart that separates the upper atria from the lower ventricles
posterior interventricular suclus
groove that separates the ventricles on the diaphragmatic surface
anterior interventricular surcafe
groove that separates the ventricles on the anterior surface
sinus venarum of right atrium
smooth wall part of atrium
pectinate muscles of right atrium
ridges in atrium that contract for pumping action of chamber
crista terminalis in right atrium
ridge that separates sinus venarum and pectinate muscles
conus arteriosus
opening of right ventricles to pulmonary trunk
path of right coronary artery
arises from right aortic sinus
travels in the anterior aspect of the atrioventricular sulcus to the posterior region of the heart
branches of right coronary artery
anterior atrial sinuatrial nodal artery atrioventricular nodal artery right marginal artery posterior interventricular artery
path of left coronary artery
arises from left aortic sinus
almost immediately splits into 2 branches that travel in the interventricular sulcus and posteriorly in the atrioventricular sulcus, respectively
branches of left coronary artery
anterior interventricular artery
circulflex artery
left marginal artery
blood supply for wall of right atrium
anterior atrial artery
blood supply for right atrium and SA node
sinuatrial nodal artery
blood supply for right atrium, right ventricle, and AV node
atrioventricular nodal artery
blood supply for wall of right ventricle
right marginal artery
blood supply for right and left ventricles
posterior interventricular artery
anterior interventricular artery
blood supply for wall of left ventricle
left marginal artery
sympathetic innervation of the heart
superior, middle, and inferior cardiac nerves (from cervical sympathetic ganglion)
parasympathetic innervation of heart
vagus nerve