The answer is supposed to be blood. Blood circulates with rather high speed through your body. It can circulate through your body in about 20 seconds. Blood carries many food elements, oxygen and carbon bi oxide.
carry waste products
It carries oxygen to the cells.
Blood
Needed substances are carried to the body's cells by RBC's, or red blood cells. Red blood cells contain hemoglobin, a substance that allows proteins to bond to them. However WBC's(white blood cells) provide the body's cells with much needed protection.
Nutrients are needed by body cells.
The body mostly needs fats which are used to produce energy. The body also needs water which is used for cooling and other important functions.
Nutrients are needed by body cells.
urinary system i think
The function of blood stream is to help in transportation of various substances accros the body.
Three substances transported by blood are nutrients, oxygen, and waste from cells.
Foods containing protein such as fish, meats and legumes
egg
Through your Intestines
The circulatory system transports the substances in your blood to your body cells.