Lecture 01: Intro to the CV System (Hayward) Flashcards
How are two circulatory systems connected?
In series: R and L sides push same volume of blood at same time
2 main divisions of circulatory system
pulmonary (R heart, low pressure) and systemic (L heart, high pressure)
4 components of each division of circulatory system
pump (heart), distribution system (arterial system), exchange region (capillaries), and collection system (venous system)
Main fx of atria
receive blood and assist its flow to the ventricles. Also do some pumping
Main fx of ventricles
pump blood. L–> eject blood to systemic circulation, R–> eject blood to pulmonary circulation
semilunar valves
allow for blood flow out of the ventricle into the pulmonary/systemic circulation
tricuspid valve
between RA and RV
Pulmonic valve
between RV and lung
mitral valve
b/w LA and LV
aortic valve
between LV and aorta
is opening/closing of valves active or passive?
passive; depends on pressure gradients only
AV valves
mitral and tricuspid valves
Main fx of arterial system
distribute blood. Also acts as a pressure storage system/regulates tissue blood flow and arterial pressure
Main fx of veins
reservoir of blood for rapid mobilization when additional blood flow/cardiac output is needed
main fx of capillaries
exchange of nutrients and elimination of waste