Answer:
No, its normal for a 15 year old boy to play sports
Explanation:
Skin immunity is a property of skin that allows it to resist infections from pathogens. In addition to providing a passive physical barrier against infection, the skin also contains elements of the innate and adaptive immune systems which allows it to actively fight infections. I hope that this helps.
Answer:
c
Emotions and anxiety can raise your heart rate!
false because one studies one part of it and in my brain it is false, cause they studied tissues not plants or any type.