Answer: yes it is I think
Explanation:
Alien technology was born With the Egyptians in 30000 bc
Answer:
It would affect the repsiratory system because it wont filter the carbon dioxide into oxygen in the blood.
Explanation:
I have no idea.
Free of unknown diseases is the least likely reason that pigs have been chosen as donors for humans in the process of xenotransplantation.
Well I would say white blood cells, saliva, and skin are three types of defenses against the bacteria.