The primary function of blood is to transport oxygen, nutrients, hormones, and waste products throughout the body. It also plays a crucial role in maintaining homeostasis, regulating body temperature, and defending against infections through its white blood cells.
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he primary function of blood in the human body is transportation. It carries oxygen from the lungs to cells and tissues, and carbon dioxide from tissues back to the lungs for exhalation. Blood also transports nutrients, hormones, and waste products throughout the body. Additionally, blood plays a vital role in regulating body temperature, pH balance, and immune responses. Overall, blood circulation ensures the delivery of essential substances and maintenance of homeostasis in the body.