For metal fires, sand can be used to cover the fire and choke it off from obtaining oxygen.

For some fish, opercula are vital in obtaining oxygen.

They pump water through the incurrent aperture, obtaining oxygen and food.

At some point, however, the cells may begin to multiply and grow new blood vessels to obtain oxygen and food.

He then obtained oxygen and nitrogen from the liquid air by slow warming.

This means it is more difficult for the fish to obtain oxygen from the water, and becomes less tolerant to low levels of dissolved oxygen.

Consequently every cell is able to obtain nutrients, water and oxygen without the need of a transport system.

If the process is severe enough, the weakened corals, no longer obtaining energy and oxygen from the algae, may die.

Aquatic vertebrates must obtain oxygen to survive, and they do so in various ways.

Ancistrus species have the capability of obtaining oxygen through their modified stomach.