Whales have only one blowhole at the top of their hea ta\hats thier only breathing source. also, look up how they sleep.
The wet parts.
Killer Whales have specialized kidneys that enable them to release high salt concentrations via urine.
Organelles
Fish have specialized parts (gills, fins, scales, for example) that enable the fish to live and breathe under water.
unicellular
Organelles
Yes. They are specialized cells. (:
Cells
They are called organelles.
both. it is not specific.
Blue whales are not "made" from any parts. They are living breathing animals that have bodies made of muscle, fat, bones, tendons, nerves and organs.
It can live in deep water.