Pulmonary circulation differs from systemic circulation
Hypoxic pulmonary vasoconstriction (HPV), also known as the Euler-Liljestrand mechanism, is a physiological phenomenon in which small pulmonary aeries constrict in the presence of alveolar hypoxia (low oxygen levels). Ref: guyton and hall textbook of medical physiology 12 edition page number: 354,355,356
Pulmonary vasodilatation in hypoxia
Pulmonary vasoconstriction in hypoxia
Decreased blood volume during systole
Increased basal vasoconstrictor tone
Respiratory system