The answer is B :),this sentence has to be longer LOL
The cells are producing carbon dioxide and water. By taking in oxygen, the one performing cellular respiration releases carbon dioxide into the air.
3. C6H12O6
4. Organic compounds are compounds made up of carbon that are typically linked to hydrogen (H), oxygen (O) and/or nitrogen (N). Glucose has C, H and O which makes it (and any other carbohydrate) organic.
5. Sugar (glucose) is in a lot of foods - bread, rice, pasta, potatoes....
6. On the label it will have the number of calories in the food (per serving!) - this is how much energy there is in that amount of the product.
Answer:
4
Explanation:
The circulatory system includes the blood that has picked up the carbon dioxide from all of the respiring tissues and who also delivered oxygen to them to continue respiring.
The blood will then reach the lung where the carbon dioxide that the tissues released is exchanged for oxygen in the alveoli.
* Blood cells isn't an organ system which makes 1 incorrect.
* Digestive system will in no way bring the blood to the lungs or away from it. This is the circulatory system's job. So 2 is incorrect.
*Lastly, lungs are organs and the question asks for organ systems. So 3 is incorrect.
