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Depends on the animal, fish take dissolved O2 from water, while terrestrial creatures may take O2 directly from the air.
Note that some aquatic organisms may utilize O2 in air simply by trapping an air bubble from which it can extract O2 from, however the reverse it not usually true (aquatic organisms utilizing air O2), with the strange exception of the lungfish (but the lungfish has both sets of O2 extracting systems, one for water and one for air).
What else can I help you with?
What are the three most important things for life on earth?
The three most important things for life on Earth are water, the atmosphere (which provides oxygen and regulates temperature), and a stable source of energy (such as sunlight) for photosynthesis and ecosystem functioning.
What is the most source of oxygen for the earth atmosphere?
The most significant source of oxygen in Earth's atmosphere is photosynthesis by plants, algae, and cyanobacteria. These organisms take in carbon dioxide and water, using sunlight to produce oxygen as a byproduct. This process has been crucial in maintaining the balance of oxygen and carbon dioxide in our atmosphere for billions of years.
Which type of energy is the most important source of energy to the Earth and its inhabitants?
The sun is the most important source of energy for the Earth and its inhabitants. Solar energy sustains all life on Earth by driving photosynthesis in plants, which provides food and oxygen for other organisms. It also helps create wind and contributes to the water cycle.
A major source of oxygen for the Earth's atmosphere is?
Plants photosynthesise to produce oxygen. They also act as a carbon sink. I suppose the largest source of oxygen on Earth is the Amazon forest in South America. Amazon forest is five and a half million square kilometers (1.4 billion acres) big. It is currently the world's most important carbon sink. The Amazon forest is estimated to produce 20% of the world's oxygen supply, excluding all the other plants (e.g. grass). For that, I suppose this is the largest source of oxygen on our planet.
What is the source of oxygen in home treatment?
The source of oxygen in home treatment is typically an oxygen concentrator or compressed oxygen cylinder. These devices deliver medical-grade oxygen to individuals who require supplemental oxygen therapy to help them breathe more easily.
What is the body most important source energy?
energy, oxygen
What is the number one energy source in the oxygen carbon dioxide cycle?
Sunlight is the most important energy source in an oxygen carbon dioxide life cycle.
Are Diatoms important source of oxygen?
Yes they are; diatoms are the main source of oxygen in the universe.
Most important element in oxygen group?
The most important is the oxygen.
What is the most important fact about Oxygen?
oxygen is most important use is for breathing
What is the most important source of capital for business expansion?
what is the most important source
What are the two most important output product from photosynthesis that are essential to life on planet earth?
The two most important output products from photosynthesis are oxygen and glucose. Oxygen is critical for cellular respiration in organisms that require it for survival, and glucose serves as a source of energy for most living organisms on Earth.
Why is led most important source of light?
LED is not the most important source of light, the Sun is.
Which is the most important gas?
The most important gas is oxygen.
What makes plants important to people?
Source of food and oxygen. No plants, no life.
What was considered the most important source of knowledge during the cultural revolution?
The most important source was the little red book
What are the three most important things for life on earth?
The three most important things for life on Earth are water, the atmosphere (which provides oxygen and regulates temperature), and a stable source of energy (such as sunlight) for photosynthesis and ecosystem functioning.
