The size of the cell is too small yet it is capable of carrying on all the characteristics of life. Why is it that the cell being so small can perform these activities without it being damaged or destroyed considering its size?

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

To kill bacteria from our body especially from stomach

The answer is lymph sinuses.