Histoxic Hypoxia results when organs are not able to absorb oxygen properly. Such as when under the influence of alcohol.
Hypoxic Hypoxia results when there is not enough oxygen in the air. Such as at high altitudes.
Anemic Hypoxia results when the blood cannot aborb oxygen and distribute it to different parts or the body. Such as during carbon monoxide poisoning.
Stagnant Hypoxia results when blood cannot move through the body freely. Such as during long periods of sitting.