pulmonary circulation and systemic circulation is a part of double circulation?
Answers
yes, Pulmonary circulation and systemic circulation is a part of double circulation
Answer: Yes, the systematic circulation and the pulmonary circulation together forms the double circulation.
Explanation:
Some points to be noted:
- Human heart has 4 chambers which separates the oxygenated and deoxygenated blood performing systolic-diastolic movement.
- Right ventricle performs pulmonary circulation and left ventricle performs systematic circulation.
- The blood vessels connected between heart and lungs are called Pulmonary vein/artery.
- Aorta is main artery and vena cava is the main vein which involves in systematic circulation.
- Artery brings oxygenated blood away from heart and vein brings the deoxygenated blood to the heart.
Double Circulation Mechanism:
1. The main aim of the circulation system is to make oxygen and nutrients available to all the body cells in diffused oxygen (via Haemoglobin, RBC) and simple nutrients form.
2. Whenever we breath-in the lungs alveoli fills itself with oxygen, it diffuses with the blood capillaries present in the alveoli.
3. This oxygenated blood which is formed in lungs alveoli is carried back to heart by Pulmonary Veins, during diastolic movement.
4. Once the heart is filled with pure oxygenated blood, it pumps itself (systole) to begin systematic circulation in which the blood is transported to all other vital organs except lungs (e.g. brain, liver, kidney, pancreas, spleen, muscles etc.) via arteries and aorta. (Left Ventricle is involved)
5. When the oxygenated blood cells reach the body cells, they consume the oxygen and available glucose in blood to perform cellular respiration and forms carbondioxide and water as end products.
Food+ Oxygen-->Carbondioxide + Water
6. This waste Carbondioxide diffuses in blood plasma and moves back to heart via veins and vena-cava passing through Hepatic Portal Vein.
7. When the heart ventricle fills itself with deoxygenated blood, it pumps itself to transfer itself to lungs via pulmonary artery. (Right ventricle is involved here)
8. At the lungs, the deoxygenated blood reaches alveoli where it converts to waste gaseous form i.e. pure carbondioxide. The lungs removes it through larynx & nasal passage (gaseous respiration).
Conclusion:
- In each circulation; the blood performs two circulations:
1. Between heart and lungs which is called as Pulmonary circulation.
2. Between heart and all other vital body cells which is known as Systematic Circulation.
In a complete circulation, the blood moves in and out through the heart twice, due to which it is known as Double Circulation (which include pulmonary and systematic circulations).
