Lesson #3 Flashcards
the circulatory system has 2 main components
cardiovascular system and lymphatic system
it is a hollow muscular organ that is surrounded by pericardium
heart
the heart is surrounded by?
pericardium
3 layers of the heart and their differences
epicardium - outer; thin, water membrane
myocardium - middle; thick layer of cardiac muscles, delivers blood in the arteries by contracting
endocardium - inner, thin, epithelial cells, lines the valves and interior chambers
this chamber of the heart receives deoxygenated blood from the body
right atrium
this chamber of the heart pumps the blood into pulmonary artery
right ventricle
this valve is located between right atrium and right ventricle
tricuspid valve
this valve is located between the left atrium and left ventricle
mitral/ bicuspid valve
pulmonary or pulmonic valve located at the entrance of the pulmonary artery
right semilunar valve
aortic valve located at the entrance of the aorta
left semilunar valve
transports the oxygenated blood from the heart andlungs all throughout the body thru the arteries, and thenthe oxygen depleted blood is returned to its origin thruthe help of the veins.
circulatory system
receives blood supply thru the left and right coronaryarteries, and coronary veins return the oxygen depletedblood from the heart muscle back to the heart.
coronary circulation
partition that separates the right from the left atria
interatial septum
separates the right and left ventricles
interventicular septum
supplies the blood and also provides drainage from the tissues
coronary circulation
sends electric impulses throughout the myocardium which is initiated by the sinoatrial (SA) node
electrical conduction system
provides the graphical representation of the cardiac cycle’s activity
Electrocardiogram (ECG)
When “lubb” is heard, which contracts and which valves close?
contracts: ventricles, ; AV valves close
When “dupp” is heard, which relaxes and which close?
semilunar valves close; ventricles relax
a rhythmic throbbing resulting from the alternating expansion and contraction of the artery
pulse
the force which was exerted by the blood on the walls of the vessel which is measured by the sphygmomanometer
blood pressure
chest pain resulting from the reduced blood flow to the heart
Angina Pectoris
a murmur sound produced when the aortic leaflets fail to fully open during systole.
Aortic Stenosis
an infection that happens when a bacteria enters and resides in the heart lining or blood vessel
bacterial endocarditis