Hemoglobin Highway

This song is performed when Phineas and Ferb are traveling through Candace's body in a miniature submarine in the Phineas and Ferb episode Journey to the Center of Candace.

Lyrics
Just the two of us,

In an esophagus,

It's time to get this mission a rollin'.

Don't wanna make a fuss,

But that was the pancreas,

Slow down before we reach the colon.

On the Hemoglobin Highway,

(Hemoglobin...)

In a mini submarine,

(Mini Submarine...)

If you're going my way,

You'll see what I mean,

Hang a left at the spleen...