What do your blood test results mean? Here's an expert's advice on how to interpret them.

Brad Reisfeld is a professor of chemical and biological engineering, biomedical engineering, and public health at Colorado State University.

Your blood serves numerous roles to maintain your health. To carry out these functions, blood contains a multitude of components, including red blood cells that transport oxygen, nutrients and hormones; white blood cells that remove waste products and support the immune system; plasma that regulates temperature; and platelets that help with clotting.