The small intestines have microvilli in the lining which help to increase the surface area of the small intestines and help to absorb nutrients.
Answer:
you need to attach a photo.
Explanation:
They can enter your blood stream (via breathing/ingesting) and once in your bloodstream they can enter cells and mutate your dna, which can cause cancer/birth defects/ reproductive harm
Liquid.
Earth can sustain life because it contains liquid water.
