Problem
1. During gas exchange in the lungs, diffuses from the alveoli into the bloodstream capillaries, and diffuses from the bloodstream capillaries into the alveoli.
2. What three features are common to all respiratory systems?
3. How are cellular respiration and organismal respiration related?
4. How is the diffusion of oxygen and carbon dioxide related to their concentration gradients?
5. When a bumblebee lands on a flower, it pumps its abdomen up and down to move oxygen into its system of tracheae through the round openings called on its abdomen.