Heart Anatomy: Cardiac Blood Flow Atrium, Ventricle, Systemic, pulmonary valves

Heart Anatomy: Cardiac Blood Flow Atrium, Ventricle, Systemic, pulmonary valves


HelpHippo: Better than learning from Wikipedia This is a heart. Atrium. Ventricles. Big “V” on the bottom for ventricles. The heart has 4 valves, remembered by “My
Try Pulls All” Mitral Tricuspid, Pulmonary Aortic. The atrium is the “entry” in for blood.
So let’s follow the cardiac blood flow on the left and right sides of the heart. Oxygenated blood
1) “enters in” to the left atrium then 2) goes through the mitral valve into
3) the left ventricle, and 4) crosses the midline to
5) exit through the aortic valve, and 6) finally goes far to get oxygen to the head
and rest of the body These systems use up the oxygen, so now the
blood is deoxygenated and returns to the heart where it: a) “enters in” to the right atrium then
b) goes through the tricuspid valve into c) the right ventricle and
d) crosses the midline to e) exit through the pulmonary valve and
f) goes to the lungs and gets oxygen. So now the blood is oxygenated and returns
to the heart where it 1) enters in to the left atrium… and this
whole cycle repeats again. Pause and review Now that we know the anatomy and blood flow,
let’s look at how the heart functions Systole is when the heart Squeezes hard.
And diastole is when the heart is getting a bigger diameter. During systole, the right ventricle only needs
to squeeze hard enough to push blood to the lungs nearby. But the left ventricle must squeeze much harder
to push the blood all the way to the head and body
which is much farther. Because the left ventricle pushes blood farther,
that is why you feel like the heart beats on the left side of your body. Speaking of the “left heart’s” function:
some say that the “left side of the heart” is the “systemic” circulation,
because the left ventricle pushes blood to the body’s systems. However, while the aortic valve is on the
“geographic right side” of the heart, it functions as part of the “left side” systemic
circulation — it’s the last valve before blood gets pushed
far to the body’s systems. Pause and review. HelpHippo: Better than learning from Wikipedia