The answer is the Precapillary sphincter
Explanation:
it should be sugar for what nucleotides contains
We need blood because it carries oxygen and helps us sustain life. The organ that pushes blood through the body is the heart.
The rocky upper layer of the solid earth is called the "lithosphere". This rocky part includes the brittle upper portion of the mantle and also of the crust. It is bounded by the atmosphere above and of the asthenosphere which is another part of the upper portion of the mantle.
