Question

which statement best explains how the digestive and respiratory systems work together during cellular respiration? image of digestive system and respiratory system diagrams

Explanation:

To determine how the digestive and respiratory systems work together during cellular respiration, we analyze their roles:

• The digestive system breaks down food into glucose (a usable energy source) through digestion and absorption.
• The respiratory system takes in oxygen ($O_2$) from the air.
• During cellular respiration, cells use glucose (from digestion) and oxygen (from respiration) to produce ATP (energy), carbon dioxide ($CO_2$), and water. The digestive system provides the glucose, and the respiratory system provides the oxygen needed for this process. Additionally, the respiratory system removes the $CO_2$ waste produced, while the digestive system processes nutrients to support energy production.

(Note: Since the question is about biological systems and their interaction, the subfield is Biology (under Natural Science). The explanation above outlines the key interaction: digestive system supplies glucose, respiratory system supplies $O_2$ for cellular respiration, and both systems support energy production and waste removal.)

Answer:

The digestive system breaks down food into glucose (a fuel for cellular respiration), and the respiratory system provides oxygen ($O_2$) needed for cells to use glucose to produce ATP (energy). The respiratory system also removes carbon dioxide ($CO_2$) waste from cellular respiration, while the digestive system processes nutrients to sustain energy production.