Pericardium and Heart Flashcards
(26 cards)
Where does the right atrium receive blood?
Superior vena cava, inferior vena cava, coronary sinus
What are the four chamber of the heart?
Right atrium, right ventricle, left atrium, and left ventricle
What does the interior of the right atrium contain?
Pectinate muscles, opening of the superior vena cava, opening of the inferior vena cava, opening of the coronary sinus, interatrial septum, and oval fossa
What is the function of the pectinate muscles of the right atrium?
Can increase the volume of the right atrium
What forms the largest part anterior surface of the heart?
Right ventricle
What forms the interior of the right ventricle?
Trabeculae carnae, tricuspid valve, chordae tendinae, papillary muscles
What is the significance of the trabeculae carnae?
Can increase the volume of the right ventricle
What is the purpose of the tricuspid valve?
To prevent backflow of blood into the right atrium
Where does the chordae tendinae originate?
Papillary muscles
What is the origin of the right coronary artery?
Right aortic sinus
What is the course of the right coronary artery?
Runs in the coronary sulcus
What is the distribution of the right coronary artery?
Right atrium, SA and AV nodes, and posterior part of IV septum
What does the right coronary artery anastomose with?
Circumflex and anterior interventricular artery
What is the origin of the right marginal branch?
Right coronary artery
What is the course of the right marginal branch?
Runs towards heart but does not reach the apex
What is the distribution of the right marginal branch?
Right ventricle and apex of the heart; right border of the heart
What does the right marginal branch anastomose with?
Interventricular branches
What is the origin of the posterior interventricular branch?
Right coronary artery
What is the course of the posterior interventricular branch?
Runs in posterior interventricular sulcus to apex of heart
What is the distribution of the posterior interventricular branch?
Right and left ventricles and posterior third of interventricular septum
What is the origin of the left coronary artery?
Left aortic sinus of ascending aorta
What is the course of the left coronary artery?
Passes between the left auricle and the left side of the pulmonary trunk in the coronary sulcus
What is the distribution of the left coronary artery?
Most of the left atrium and ventricle, interventricular septum, and atrioventricular bundles; may supply AV node
What does the left coronary artery anastomose with?
Right coronary artery
