Which body system does gut belong?

What chemical formula does Cu mean? Where is the eustachain tube found? What is the plants food that is a kind of sugar called? What are the 4 steps of the nutrient cycle? Are vegetative cells metabolically active or inactive? When water is heated it begins to boil at a temperature of 100c this statement is best described as? What is the difference between a exothermic chemical reaction and a endothermic chemical reaction? Who wrote big bang theory of creation? Why is external criticism so important when it comes to analyzing? What are two chemicals that can help save lives? How fast does the nasal membrane heal? What are the 5 spachlization of earth? What is the role of molecules such as nadth Nah and sadh2 in metabolic processes? What disease or infection does micrococcus luteus cause? Because bacteria are living cells which of the following should all bacteria be expected to have? What do a venus fly trap smell with? What was meat broth boiled in Pasteur's experiment of spontaneous generation? What would happen if one subsystem was removed? Why don't iron and steel rust? What is located at 25.5 degrees north latitude and 52 degrees east longitude?