Explanation:
As shown in the illustration the highest percentage of air is composed of nitrogen gas at 78%. The second highest percentage is oxygen at 21%. The other trace gases, including carbon dioxide, make up about 1% of the gas composition.
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Answer:
(1) Red Blood Cell
(2) Enzymes
Explanation:
(1) Oxygenated Red Blood cells transport oxygen from the lungs through the body using the arteries as a channel of movement to all organs.
(2) Enzymes are proteins that catalyze chemical reaction in the digestion of food so as to break food down into a form which can be absorbed by the body.
Its is to remove liquid waste from the blood in the form of urine, and keep a stable balance of salts and other substances in the blood and produce erythropoietin, hormone that is the formation of ref blood cells. The kidney remove ursa from the blood through this filtering units called nephrons