The lungs are the primary organ of the: digestive system respiratory system excretory system nervous system

Which sequence correctly shows the path of carbon dioxide during repiration?

Which statement best compares aerobic and anaerobic respiration

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6