Class 11 Biology Body Fluids Circulation Double circulation

Double circulation

  • When the deoxygenated blood pumped into the pulmonary artery is passed on to the lungs from where the oxygenated blood is carried by the pulmonary veins into the left atrium; this pathway constitutes the pulmonary circulation.
  • The oxygenated blood entering the aorta is carried by a network of arteries, arterioles and capillaries to the tissues from where the deoxygenated blood is collected by a system of venules, veins and vena cava and emptied into the right atrium.; this is the systemic circulation.
  • A unique vascular connection exists between the digestive tract and liver called hepatic portal system.
  • The hepatic portal vein carries blood from intestine to the liver before it is delivered to the systemic circulation.
  • A special coronary system of blood vessels is present in our body exclusively for the circulation of blood to and from the cardiac musculature.

Class_11_Biology_Body_Fluids_&_Circulation_Double_Circulation

Fig. Double circulation

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