Mya is running a marathon. Her heartbeat increases. How does the increase in heartbeats assist Mya’s respiratory system? The increase of blood through her body allows for more oxygen to be delivered to her tissues. The increase of blood through her body allows for less oxygen to be delivered to her tissues. The increase of blood through her body allows for more carbon dioxide to be delivered to her tissues. The increase of blood through her body allows for less carbon dioxide to be delivered to her tissues.b
