When the immune system attacks itself.
Answer:
cantaloupe
Explanation:
As a kid your heart is about he size of one fist however as you grow it gets to be about the size of two fists put together so a cantaloupe for an adult and a fist for a child.
<span>regular exercise and good nutrition</span>
Answer:
O-
Explanation:
it is the universal blood type so evveryone can get it put in their body
