Cardiovascular+System+Notes+CH

400,000,000 alveoli (look like a bunch of grapes (100 m^2 of surface)

[|Heart Animation]

Four chambers: two atria, two ventricles, for four chambers. Parts: Left atrium and left ventricle are on the right side. Right atrium and right ventricle are on the left side. -Right side of the heart receives blue blood because it doesn't have oxygen (from veins). Left side of the heart receives red blood because it has oxygen. -Veins bring blood to the heart -Blood Flow: 1. From a vein to right atrium 2. From right atrium to right ventricle while heart is relaxed -Pulse: feeling the pulse of an artery every time the heart contracts -lub DUB (louder) sound-a valve between the atrium and the ventricle a valve between the ventricle and the artery (aorta)



Blood Pressure: 120/80 (normal) -first number-->Systole: pressure of blood after the heart contracts -second number-->Diastole: pressure of blood when heart relaxes