Water Dance

They are the flow

from which all grow.

Every water molecule,

all very miniscule,

pass through the membrane

with no strain.

In and out,

up and down,

side to side

they bounce and they glide

in body rolls and twists

or any move that exists.

Past the tissue they slip and slide,

holding contests for the worm and the floss

as, like primacy, they shuffle across,

trailing the salt around

like insects do to light.

Water tends to compound

when the solute gap gets wide.

For the particles will leave the party if there isn't enough

and appear in all the popular places that have all the fun,

but in both cases, well things could get rough.

Since if they all leave, the cell shrivels up like a raisin,

but if it's too crowded, the cell's prone to lysing,

and neither are conditions it can manage to live in.

Concentration is what it's about

making sure it's even on both sides.

Whose passage cannot be denied,

but by the gradient will sure abide.