Collagen fibers and blood vessels make up 20 percent of the dermis. Collagen provides structural support and elasticity to the skin, while blood vessels help in nourishing the skin cells and regulating temperature.
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Artificial skin usually consists of a synthetic epidermis and a collagen-based dermis. The artificial dermis consists of fibers arranged in a lattice that act as a template for the formation of new tissue.
Nitrogen is the gaseous nonmetal that makes up 78 percent of Earth's atmosphere.
Approximately 20 percent of the Earth's atmosphere is made up of oxygen.
The Pacific Ocean makes up around 20% of the Earth's water surface area. It is the largest and deepest ocean on the planet, covering more than 60 million square miles.
Jupiter is the planet that makes up about 70 percent of the total mass of all the planets in our Solar System.