when nutrients enter the blood vessels from the small intestine, they are first transported to the

The correct answer is liver.

Liver is best described as an an organ only found in the vertebrates class, Its action involves detoxifies diverse metabolites, synthesizes proteins in the body, and produces biochemicals needed for digestion in vertebrates. In humans, it is positioned inside the proper top quadrant of the stomach, under the diaphragm. Its different roles in metabolism consist of the regulation of glycogen storage, decomposition of red blood cells and the manufacturing of hormones.