3-heart Flashcards
– – is where blood from WALLS of heart returns to the heart
Coronary sinus
Name the 3 layers of the heart wall from outermost to innermost
Epicardium
Myocardium - involuntary muscle
Endocardium
The coronary sinus opens into the – atrium on the – surface
Opens into right atrium on posterior surface
Which 3 vessels empty into the right atrium
Superior vena cava
Inferior vena cava
Coronary sinus
The – – is a shallow depression in the right atrium divides the heart into 2 and allows for efficient distribution of oxygenated blood thru body
Fossa ovalis
Tricuspid valve
Right atrioventricular valve (3 lobes)
The – atrium receives oxygenated blood from 4 pulmonary veins
Left atrium
Other names of left atrioventricular valve
Bicuspid & mitral
The AORTIC valve has – thin semilunar cusps
Three (the cusps look like a peace sign)
The – mm are parallel ridges in the atria wall
Pectinate
A thickly woven arrangement of cardiac m (same as pectinate mm)
Trabeculae carnae
The chordae tendinae are held by the – m
Papillary m
2 branches of the ascending aorta
Left and right coronary arteries
3 branches of Aortic Arch
- Brachiocephalic trunk - right common and carotid arteries
- Left common carotid artery
- Left subclavian artery
* heart is centered slightly to the left*
The – nerves are next to the esophagus
Vagus
The – is formed from fusion of left and right Brachiocephalic veins and drain into the RIGHT atrium
Superior vena cava
Name change of Descending Thoracic aorta and where it happens
Renamed descending Abdominal aorta at the diaphragm
Where does the aorta bifurcate into left and right common iliac arteries
4th lumbar vertebra
Left and right common iliac arteries divide into
Internal and external arteries
Where av node is located
Interatrial septum (before av valve)
2 events for 1 heart beat
- Atrial systole (contraction) and ventricular diastole (relax)
- Atria relax/diastole, ventricular systole
- is closure of av valves as ventricles contract
- - is closure of semilunar valves as ventricles relax
Lubb
Dupp
In ventricular systole, pressure in the ventricles rises high enough => – valves open
Semilunar valves open as ventricles contract
Control center of heart rate
Brainstem
