Hypoxia is the condition in which there is a deficiency of oxygen at the tissue level.
Arterial hypoxia: It’s because of low level of oxygen in the blood. It occurs when the atmosphere does not contain enough oxygen and there is obstruction in the respiratory passage.
Anaemic hypoxia: It is due to very low level of haemoglobin in the blood.
Stagnant hypoxia: It is due to the inadequate blood flow to deliver oxygen to the tissue.
Histoxic hypoxia: It is due to the presence of toxic substances in the oxygen inhaled,
e.g.: Cyanide poisoning.
