[Verse 1]
From the heart the aorta rises high
Curves to the left across the sky
Over the left main bronchus it goes
That's the pathway that nature chose
Three branches split in perfect order
Like a tree across the border
[Chorus]
Brachiocephalic first in line
Left carotid next in time
Left subclavian makes it three
Down the spine runs free
Normal arch goes left you see
That's anatomy's decree
[Verse 2]
Brachiocephalic splits in two
Right carotid and subclavian too
While the left side keeps it clean
Carotid and subclavian stay lean
Separate branches on the left
No splitting, no bereft
[Chorus]
Brachiocephalic first in line
Left carotid next in time
Left subclavian makes it three
Down the spine runs free
Normal arch goes left you see
That's anatomy's decree
[Bridge]
But when the arch decides to flip
Takes a right side trip
Over right bronchus it will sail
Mirror image tells the tale
Right arch means the pattern's switched
All the branches get re-pitched
[Verse 3]
Descending thoracic aorta flows
Down the left side as it goes
Running parallel to spine
Blood supply in perfect line
From the arch to abdomen
Life's river flows again
[Chorus]
Brachiocephalic first in line
Left carotid next in time
Left subclavian makes it three
Down the spine runs free
Normal arch goes left you see
That's anatomy's decree
[Outro]
Left is normal, right's the change
When the pattern rearranges
Three branches in their sacred dance
Give the body its life chance