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.
The answer is 20 minutes a day in order to have an effective cardio exercise.
Explanation:
implantation is important because is parts of the babies survival since when the fertilized egg forms it needs oxygen and nutrients to live until birth
Answer:
How do I take this medication?
Explanation:
Vaccinations are mainly used to prevent the spread of
a. viral diseases.
a. viral diseases.(<span>measles or <span>hepatitis B...)</span></span>