Which substance nourishes and supplies oxygen to the body?

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Multiple Choice

Which substance nourishes and supplies oxygen to the body?

Explanation:
Blood nourishes and supplies oxygen to the body because it is the transport system that carries oxygen from the lungs to every cell via red blood cells and hemoglobin, and it also delivers nutrients while removing waste. Nerves handle signaling, not nutrition or oxygen transport. Sebum is an oily secretion that moisturizes the skin but doesn’t deliver oxygen. Keratin is a structural protein in the skin and nails, not a transport medium. So blood is the substance that fulfills both nourishment and oxygen delivery for the body's tissues.

Blood nourishes and supplies oxygen to the body because it is the transport system that carries oxygen from the lungs to every cell via red blood cells and hemoglobin, and it also delivers nutrients while removing waste. Nerves handle signaling, not nutrition or oxygen transport. Sebum is an oily secretion that moisturizes the skin but doesn’t deliver oxygen. Keratin is a structural protein in the skin and nails, not a transport medium. So blood is the substance that fulfills both nourishment and oxygen delivery for the body's tissues.

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