Answer: circulatory system - transports, oxygen, carbon dioxide, nutrients, waste, hormones, and other materials throughout the body. respiratory system - exchange of oxygen and carbon dioxide gases. reproductive system - makes more of its own kind. Skeletal system - supports and protects internal organs, provides the framework of the body. Muscular system - allows movement. Endocrine system - regulates body functions using chemicals called hormones. Excretory system - removes waste from the blood. Nervous system - coordinates and controls body functions using electrical messages. Integumentary system - protects and covers internal organs, aids in body temperature regulation, and waste removal. Immune system - protects and defends the body against germs that have entered the body. Digestive system - physically and chemically breaks down food into usable form.
