The bends, and changes to the voice, are examples of how underwater living changes the body physiologically-relating to how the bodies of living humans and animals function.
One example is the bends, or decompression sickness, a serious medical disorder created by nitrogen bubbles in the muscles when returning to the surface of the sea too quickly.
And graceful little Alice pulled back her lips in a horrific grimace and let loose with a guttural snarl that had me cowering against the seat in terror.
Hard to imagine her legs once strong, the bones hard and parting water, clean sharp strokes, not bent and wrinkled like a baby, not drowning under the sticky yellow light.
She looked at the oak: he would be a wizened, but hearty old man with a frizzled beard and warts on his face and hands, and hair growing out of the warts.
But they face many physiological problems-problems relating to how the human body functions, such as the bends-a painful medical condition caused by returning too quickly to atmospheric pressure-the Earth's usual air pressure.
A sharp pain rose in Harry's throat at this sight: for a moment, the strange music and the knowledge that Dumbledore's body was so close seemed to take all warmth from the day.