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a. hemoglobin and red blood cell b . oxygenated blood passed through arteries c. the valve present between Atria and ventricle helps in joining these two vessels d .the structural difference is that veins have a thin wall and can be seen through skin and arteries cannot be seen through skin
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The Mobil brand now mainly covers a wide range of automotive, industrial, aviation and marine lubricants. For historic reasons, the Mobil brand is still used by Mobil service stations and for fuel (gasoline, diesel, heating oil, kerosene, aviation fuels and marine fuel) products.
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