Three materials transported in living organisms include:
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Oxygen: In animals, oxygen is transported by hemoglobin in red blood cells from the lungs to tissues, where it is used for cellular respiration.
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Nutrients: In both animals and plants, nutrients (such as glucose, amino acids, and vitamins) are transported through the bloodstream in animals or the phloem in plants to cells and tissues that need them for energy and growth.
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Waste Products: Metabolic waste products, such as carbon dioxide (produced during cellular respiration) and urea (produced during protein metabolism), are transported to excretory organs (like the lungs and kidneys) for removal from the body.