Bloods Functions:
Blood has many functions in the body. Some of those functions include providing nutrients and oxygen to the body. Blood also spreads hormones throughout the body, and transporting cells that protect the body. All while removing wastes from your system.
http://upload.wikimedia.org/wikipedia/commons/8/82/SEM_blood_cells.jpg
http://upload.wikimedia.org/wikipedia/commons/8/82/SEM_blood_cells.jpg