Answer:
Periodically test food for illness causing microorganisms.
Explanation:
Answer:
B. a substance that sends the immune system into action
Explanation:
I think it is chromosomal abnormalities
Blood type O, it can be given to other types, but it can not receive other types, because of the different properties in the blood.
Answer:
Angioplasty is used to open narrowed arteries and increase oxygen-rich blood flow to muscle and tissue.
