The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest? Support your answer with the scientific details required.

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

In general, are there any major differences that you can see? explain

The function of the excretory system is to control homeostasis and