Fill in the Blanks Fill in the blank - Body Systems Part 1Online version Fill in the blank - Body Systems Part 1 by Benjamin D Morgan 1 TWO ORGANS FUNCTIONS LUNGS SPECIALIZED DIGESTIVE OXYGEN nutrients TISSUES BLOODSTREAM WASTE URETERS VEINS MOUTH Tissues are a group of similar cells that work together to perform a function . Then , organs are the result of or more different that work together to perform a function . Finally , organ systems are a group of that work together to perform vital body . The circulatory system which is made up of blood , arteries , and the heart are used to transport oxygen , waste , , HORMONES , heart , and mroe around tbe body . The excretory system includes the kidneys , and bladder tend to remove from the blood / body . The system's function is to break down food that can enter the using organs such as the , esophagus , stomach and small intestine . The Respiratory system's function is to drop off and get rid of Carbon dioxide into the blood using organs such as the nose , trachea , and .