Nitrogen gas is fairly inert and so is difficult for organisms to process. Instead, animals must get usable nitrogen compounds from their food.
Animals obtain nitrogen by eating plants which have absorbed nitrogen from the soil.
mostly from food.
Nitrogen
Most organisms obtain nitrogen in the form of nitrate (NO3-) or ammonium (NH4+). These forms of nitrogen are usually present in the soil and can be taken up by plants. Animals then obtain nitrogen by consuming plants or other animals.
Animals will lose nitrogen when they die. This is whey decay and nitrogen is released as ammonia into the air.
Animals obtain the nitrogen needed to make proteins and nucleic acids by consuming foods that contain nitrogen, such as plants or other animals. The nitrogen is then broken down and used by the body to build the necessary molecules for growth and repair.
Animals obtain nitrogen primarily through the consumption of plants or other animals that contain nitrogen-containing compounds, such as proteins. They break down these compounds during digestion and reuse the nitrogen to build their own proteins and other essential molecules.
One can obtain nitrogen gas at home by purchasing a nitrogen gas cylinder from a supplier or using a nitrogen gas generator to produce nitrogen gas from the air.
Animals obtain nitrogen primarily through their diet by consuming plants and other animals that contain nitrogen-based compounds. Plants absorb nitrogen from the soil in the form of nitrates and ammonium, which they incorporate into proteins and nucleic acids. When animals eat these plants or other animals, they break down the proteins and nucleic acids to access the nitrogen, which is then used to synthesize their own molecules. Additionally, some animals can also obtain nitrogen from symbiotic relationships with certain bacteria that fix atmospheric nitrogen.
Bacteria in soil obtain their nitrogen primarily from organic matter, such as dead plants and animals. They can also obtain nitrogen through nitrogen fixation, a process where certain bacteria convert atmospheric nitrogen into a form that plants can use.
From plants or air.
Air/gas animals and humans breathe in, and a little bit of nitrogen is included in the air it has just breathed in.