why is it important for the cells in the lungs and digestive tract to be simple instead of being stratified?

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

Wich organism obtains its energy from dead or decaying matter

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?