I will need the picture or information to answer this.
I believe it’s carbon dioxide, because you use your respiratory system to breathe in oxygen, and oxygen goes through your circulatory system. And you breathe out CO2.
Answer: if the student with asthma had an alergy to something in the room it could trigger there asthma and have an attack
Explanation:
Answer: The integumentary system helps the immune system by The skin acts as a barrier to keep out pathogens (B)
Explanation:
