All journeys must have a some start,
today it's blood entering your heart:
Two pipes join at the top
of your blood's first pit-stop;
your atrium is where it'll fast dart.
So through the tricuspid valve blood seeps,
and then to a ventricle it ekes.
That cavity then squeezes,
with the force of ten sneezes
like a wound balista releases!
Past the big pulmonic valve blood’s bumped,
and into another tube it’s dumped.
The blood goes in a lung,
and with air it is wrung,
and back to the heart it is pumped.
Thus, into the atrium blood flows;
But alas, the cavum shall then close
and the blood can't quite fit.
It's let out through a slit--
pushed through the mitral valve blood goes!
Then into a ventricle goes the stuff,
but out again it is in a huff!
Sans reason and order
it goes to the aorta
which makes sure your organs get enough!