Test 3 Flashcards
THREE STAGES THAT HEART WORKS IN
- Blood flows into atria 2. Both atria contract at the same time, force blood into the ventricles 3. Both ventricles contract at the same time, force blood through the pulmonary artery and aorta
Aorta
largest artery in the body. Exits the heart from the left ventricle carrying oxygenated blood to the body
Right and left pulmonary arteries KNOW
the largest arties carrying deoxygenated blood, exiting the right ventricle to lungs
Superior Vena Cava
largest vein that enters the right atrium carrying deoxygenated blood from the upper body
Inferior Vena Cava
large vein that enters the right atrium carrying deoxygenated blood from the lower body.
Right and left pulmonary vein KNOW
return from the lungs bringing oxygenated blood to the left atrium.
Three layers of heart
Epicardium Outside layer This layer is the visceral pericardium Connective tissue layer Myocardium Middle layer Mostly cardiac muscle – contracts Endocardium Inner layer Endothelium
Artery
oxygenated blood (arteriole)
Vein
deoxygenated blood ( venule)
Capillary
exchange of O2, CO2, water
R Atrium
The R Atrium receives __deoxygenated__blood from superior and inferior vena cavae
valve to Right ventricle
Tricuspid
R Ventricle
contracts and sends blood through the pulmonary semilunar valve to the ___Pulmonary_Artery____to the lungs
L Atrium
receives newly __oxygenated __Blood__
Blood passes
Blood passes thru the __Left Artium___into the L ventricle
L ventricle
pumps blood past _Arotic semilunar valve__ into the aorta
Blood circulates
throughout the body and back to the heart again
Diastole
relaxation phase
Systole
contraction phase
Cardiac output
Amount of blood pumped out by a ventricle in a 1 minute period.
Heart rate X stroke volume =
Cardiac output
Cardiac cycle
- the contraction phase of the heart is the Systole (atrial contraction squeezing all the blood form the atria into ventricles, causing them to be full) and the relaxation phase is the diastole (both atria fill with blood while AV valves are closed).
know
Karnoven formula
Coronary Arteries
• The branches of the coronary arteries are first divided into two major coronary arteries, the Left Main and Right Coronary Artery. • The left main divides into the Left anterior Descending (LAD) and the Circumflex. • The right branches into the right marginal artery and posterior interventricular artery. • They both provide nourishment of the heart muscle.