Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Did you know?
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Apparent and True Orbits of Alpha Centauri.
True-color image of layers of haze in Titan's atmosphere.
True Friendship
Midsagittal section indicating locations of true and false pelves
Preschool children played with same-sex or opposite-sex playmates
Opposite polarity of synthesis along the two strands of DNA