Heart Flashcards
What are the muscles within the right atrium called?
Pectinate muscles
What is the smooth surface next to the pectinate muscles called?
Crista terminalis
What is the semitransparent part of the RA that closes after you are born?
Fossa ovalis
What are the 3 cusps of the tricuspid valve?
- Anterior
- Posterior
- Septal
What are the 3 combinations of cusps that provide redundancy of the heart?
- Anterior and septal
- Anterior and Posterior
- Posterior and septal
What are the cusps connected to and how?
-Connected to papillary muscles by cordae tendonae
What are the muscles on the side of the right ventricle wall called?
Trabeculae carnae
Where is the septal cusp located?
Along the septum between the ventricles
Each cusp receives cordae tendonae from ___ papillary muscles
2
What muscle is located on the wall of the right ventricle?
Trabeculae carnae
What is the thicker piece of trabeculae carnae called that is located near the bottom of the right ventricle?
Moderator band
What is another name for moderator band?
Septomarginal trabecular (speeds up conduction)
How does blood move from right ventricle to the lungs?
Pulmonary truck
What is the dilated portion leading to the pulmonary truck?
Conus arteriosus
What direction does the outflow tract of the aorta go?
To the left
What are the 3 cusps in the pulmonary valve?
- Right semilunar cusp
- Left semilunar cusp
- Anterior semilunar cusp
Anterior cusp–>
Pulmonary truck
Posterior cusp–>
aortic
How many opening for pulmonary veins are there?
4- 2 from each lung
What are the cusps of the mitral valve?
- Anterior cusp
- Posterior cusp
How many papillary muscles does the mitral valve have?
2
What ventricle is thicker?
Left- because it pumps against vascular resistance
How many cusps does the aortic valve have?
3
What are the names of the cusps on the aortic valve?
- Right semilunar cusp
- Left semilunar cusp
- Posterior semilunar cusp
What are the pockets in the cusps called?
-Aortic sinuses
R, L, and posterior aortic sinuses
Where do the openings in the right and left aortic cusps lead to?
Right–> leads to right coronary artery
Left–> leads to the left coronary artery
Is the left coronary artery short or long?
Short- quickly bifurcates into -Anterior descending coronary artery
-Left circumflex coronary artery
What is the path of the right coronary artery?
Wraps around posteriorly
-and gives of posterior descending coronary artery
What vein travels with the descending coronary artery?
Great cardiac vein
What collects blood from all of the cardiac veins?
Coronary Sinus
What veins directly empty into the right atrium?
Anterior veins
