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more than 4 weeks ago
Pulmonary circulation is the part of the circulatory system that carries deoxygenated blood from the heart to the lungs and back again. It begins when deoxygenated blood is pumped from the right ventricle of the heart through the pulmonary artery to the lungs. In the lungs, the blood picks up oxygen and releases carbon dioxide through the process of gas exchange in the alveoli. The oxygenated blood then returns to the heart through the pulmonary veins and is pumped into the left atrium. From there, it is pumped into the left ventricle and then out to the rest of the body through the systemic circulation. Pulmonary circulation is essential for oxygenating the blood and removing carbon dioxide, allowing the body to function properly.
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Google Gemini AI
more than 4 weeks ago
Pulmonary Circulation
Pulmonary circulation is the part of the circulatory system that moves blood from the heart to the lungs and back to the heart. It is a low-pressure, low-resistance system that allows for efficient gas exchange between the blood and the lungs.
Steps of Pulmonary Circulation:
1. Deoxygenated Blood to the Right Heart: Deoxygenated blood from the body returns to the right atrium of the heart through the superior and inferior venae cavae.
2. Right Ventricle to Pulmonary Trunk: The right atrium contracts, pushing blood into the right ventricle. The right ventricle then contracts, pumping the deoxygenated blood into the pulmonary trunk.
3. Pulmonary Trunk to Pulmonary Arteries: The pulmonary trunk divides into two pulmonary arteries, which carry the deoxygenated blood to the left and right lungs, respectively.
4. Pulmonary Arteries to Capillaries: In the lungs, the pulmonary arteries branch into a dense network of capillaries that surround the alveoli, the tiny air sacs where gas exchange occurs.
5. Gas Exchange: Carbon dioxide diffuses from the blood into the alveoli, while oxygen diffuses from the alveoli into the blood.
6. Oxygenated Blood to the Left Heart: The oxygenated blood collected from the capillaries flows into pulmonary veins. The pulmonary veins converge to form four pulmonary veins, which carry the oxygenated blood back to the left atrium of the heart.
7. Left Atrium to Left Ventricle: The left atrium contracts, pushing the oxygenated blood into the left ventricle. The left ventricle then contracts, pumping the oxygenated blood into the aorta.
8. Aorta to the Body: The aorta is the main artery of the body that carries oxygenated blood to all tissues and organs.
Physiological Features:
- Low pressure and resistance compared to systemic circulation
- Driven by the right ventricle
- Provides oxygen to the body and removes carbon dioxide
- Contributes to maintaining blood pH balance
Pulmonary circulation is the part of the circulatory system that moves blood from the heart to the lungs and back to the heart. It is a low-pressure, low-resistance system that allows for efficient gas exchange between the blood and the lungs.
Steps of Pulmonary Circulation:
1. Deoxygenated Blood to the Right Heart: Deoxygenated blood from the body returns to the right atrium of the heart through the superior and inferior venae cavae.
2. Right Ventricle to Pulmonary Trunk: The right atrium contracts, pushing blood into the right ventricle. The right ventricle then contracts, pumping the deoxygenated blood into the pulmonary trunk.
3. Pulmonary Trunk to Pulmonary Arteries: The pulmonary trunk divides into two pulmonary arteries, which carry the deoxygenated blood to the left and right lungs, respectively.
4. Pulmonary Arteries to Capillaries: In the lungs, the pulmonary arteries branch into a dense network of capillaries that surround the alveoli, the tiny air sacs where gas exchange occurs.
5. Gas Exchange: Carbon dioxide diffuses from the blood into the alveoli, while oxygen diffuses from the alveoli into the blood.
6. Oxygenated Blood to the Left Heart: The oxygenated blood collected from the capillaries flows into pulmonary veins. The pulmonary veins converge to form four pulmonary veins, which carry the oxygenated blood back to the left atrium of the heart.
7. Left Atrium to Left Ventricle: The left atrium contracts, pushing the oxygenated blood into the left ventricle. The left ventricle then contracts, pumping the oxygenated blood into the aorta.
8. Aorta to the Body: The aorta is the main artery of the body that carries oxygenated blood to all tissues and organs.
Physiological Features:
- Low pressure and resistance compared to systemic circulation
- Driven by the right ventricle
- Provides oxygen to the body and removes carbon dioxide
- Contributes to maintaining blood pH balance
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