oxygen
oxygen
Nitrogen.
Nitrogen makes up most of the atmosphere. I am not sure which comes in second place, oxygen or carbon dioxide. I know our levels of carbon dioxide is rapidly increasing on this planet.
Cardiac muscle makes up the bulk of the heart. That tissue is made of cardiomyocytes or muscle cells.
Nitrogen makes up about 79% of the atmosphere.
The Neuron.
CO2 makes up approximately 0.03% of Earth's atmosphere
Nitrogen (which makes up about 78% of the atmosphere) and Oxygen (about 21%)
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Nitrogen makes up about 80% of the Earth's atmosphere.
Oxygen makes up 95% of Earth's atmosphere.
enamel