Whats the path of a carbon dioxide molecule as it leaves the body

Archaebacteria use for movement. celia flagella pili cell walls

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis