Cardiac Cycle Flashcards
Q: What does the ascending aorta originate from, and what does it supply?
left ventricle and supplies the coronary arteries.
From where does the right atrium receive blood?
from systemic circulation via the superior and inferior vena cava.
How do cardiac veins drain into the right atrium?
via the coronary sinus.
What is the crista terminalis?
It is a ridge in the right atrium that separates the smooth posterior wall from the rough anterior wall.
What does the posterior wall of the left atrium receive?
four pulmonary veins.
What is the function of the pulmonary veins entering the left atrium?
carry oxygenated blood from the pulmonary circulation.
What structures are found in the interior chamber of the right ventricle?
trabeculae carneae.
What are the components of the tricuspid valve?
• Chordae tendineae
• Papillary muscles
What is the function of the tricuspid valve components (chordae tendineae and papillary muscles)?
They prevent backflow during systole.
What is the role of the right ventricle in blood circulation?
It pumps blood through the pulmonary valve (semilunar) into the pulmonary trunk to the lungs.
What are the raised bundles of cardiac muscle in the right ventricle called?
Trabeculae Carneae
What prevents backflow in the right ventricle during systole?
chordae tendineae, and papillary muscles.
Through which valve does blood exit the right ventricle to the pulmonary trunk?
pulmonary valve (semilunar).
What is the role of papillary muscles and chordae tendineae in the left ventricle?
They anchor the atrioventricular (AV) valves and prevent backflow of blood.
How does the myocardium of the left ventricle compare to the right ventricle?
It is thicker
