Gills pump water, extracting oxygen.

Meaning: This sentence describes the fish's gills taking in water and removing oxygen from it.

Choice of Words: Gills are the organs that fish use to breathe. Pump means to move a liquid or gas in or out of something. Water is a transparent, colorless liquid that covers much of the Earth's surface. Extracting means to remove something from something else. Oxygen is a gas that is necessary for life.

Alternative Expressions

Fish breathe through gills.

Meaning: This sentence describes how fish breathe. Fish breathe through gills, which are special organs that allow them to take in oxygen from the water.

Choice of Words: Fish are animals that live in water and have gills. Breathe means to take in air or water to get oxygen. Through means to move or pass from one place to another. Gills are special organs that fish have to breathe underwater.

Fish use gills to extract oxygen from water.

Meaning: This sentence describes how fish breathe underwater. Fish use gills to extract oxygen from water. Gills are special organs that allow fish to take in oxygen from the water.

Choice of Words: Fish are animals that live in water and have gills. Use means to employ or put something into service. Gills are special organs that fish have to breathe underwater. Extract means to take something out of something else, like taking oxygen out of water. Oxygen is a gas that is necessary for life and that fish breathe through their gills.

Related Expressions