"Son, what you've got there's nothing but a big swim bladder!"
"A swim bladder. That's how most kinds of fish get rid of their CO2. Their gills don't do it; they just bring in oxygen. Instead, they've got this nest of real small veins---capillaries---around the bladder. Blood flows through it and the CO2 gets filtered out."
"Never heard of it before. Guess I thought the gills did that. I'll bet it's got a Latin name."
"Yep. It's better than 'bladder,' too. Rete mirabile.
|back to Node 2 cluster|