Answer:
Dorsal lol, its contracts and pumps blood to the aortic arches.
The correct answer is they filter water and solutes from blood.
<span>The nephron is a structural unit of kidneys with the function to filtrate blood in order to produce urine. A nephron is used to ultrafiltrate water, ions and small molecules from the blood, to excrete wastes and toxins, and return needed molecules to the blood (reabsorption).</span>
Buffer?
<span>A buffer is the substance that prevents rapid or large swings in pH
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That element is <span>Nitrogen.</span>
