* ATP (adenosine triphosphate): This is the primary energy currency of cells.
* Carbon dioxide (CO₂): A waste product of respiration.
* Water (H₂O): A by-product of respiration.
Key Differences:
* Source of energy: Animals obtain energy from the food they eat, which is broken down through respiration. Plants primarily use sunlight for energy through photosynthesis, but they also respire to obtain energy from stored sugars.
* CO₂ usage: Plants use CO₂ during photosynthesis, while animals release it during respiration.
* Overall equation: The overall equation for cellular respiration is the same in both plants and animals.
Why It Might Seem Different:
* Focus on animal respiration: Biology textbooks often focus more on animal respiration because it's more directly relevant to human physiology.
* Visibility of CO₂: Animals exhale CO₂ (which is why we breathe out), making it more readily observable.
In conclusion: Both animals and plants carry out cellular respiration with essentially the same products. While the focus might be more on animal respiration in certain contexts, both processes are essential for life.
