releases body fluids and other whale wastes

They have lungs. They go up to get air and then close their blow holes so water can't go in and they can hold it for more than a hour.

they blow out water

Mammals don't breathe under water. They hold their breath like you or I would...except their lungs are gigantic and they can hold their breath for hours.

No they don't. Whales are mammals and thus need to breathe like most mammals do. In order to breathe, whales have blow holes on their heads. They come up to the surface of the water, bring their blow hole out of the water, open it and take in air, and then go back under water again.

No basically.

Orca Whales have blow holes so when they have water or anything they swallowed they can blow it out. Kind Of like a burp. :)