Hemoglobin Highway Lyrics

Just the two of us,
In an esophagus,
It's time to get this mission rolling,
Don't wanna make a fuss,
But that one's pancreas,
Look down before we reach the colon,
On the Hemoglobin Highway,
In a mini submarine,
And if your going my way,
You'll see what I mean,
Take a left at the spleen!