Your presence makes us fatter.
If it weren't for you, we wouldn't be humans;
We'd all be flukes, only flatter.
True you are but just a space;
Contained in you is nothing.
Because of you I have a face;
I feel like I am something.
A pig, a pigeon, a frog, a worm,
They all have coeloms too.
You give them room to have a heart
And lungs and muscles true.
Behold the fluke, it is so small;
A coelom it lacks, it's flat.
It has intestines but that's not all:
There's a uterus and testes, too.
Oh, to be a nematode
And squirm only left to right.
Roundworms have no coelom true;
Their intestines are collapsed.
An annelid is segmented
Thanks to its cavity.
Oligochaetes and Polychaetes
Have lovely metamerity.
Coeloms are there, too.
Fishies float because the space
Gives buoyancy in the blue.
Coeloms are found on land and sea,
In tadpoles and in toads.
From gills to lungs and tails to legs
Coeloms support them, whoopee!
Up in the sky, the pigeon high
Has coeloms everywhere.
It's highly advanced and on the fly;
Homeothermia in the air.
Pigs, of course, have coeloms, too;
Their bodies large and stout.
Without that space within its chest
It might not have a snout.
As you can see, from fluke to pig,
A coelom has impact.
Without a coelom we are nothing,
But with one, we are big.
