Answer:
Irregular, short, long, and flat
Explanation:
Answer:
im in jr hi school
Explanation:
i accidently put my age to 16 but im 11 in a half 7th grade
Answer:
The skin
Digestive tract
Vagina
Mucous membrane
Explanation:
The skin prevents microbes from entering the body
Digestive tract e.g. stomach acid is a natural defence mechanism
The vagina is acidic and this prevents harmful bacteria from growing with it's own flora.
Mucous membranes e.g. lining of the mouth, nose, eyelids are all defense mechanisms.