Hepatic fibrosis occurs when scar tissue replaces damaged cells in the liver. Over time, accumulating scarring distorts the liver, interferes with its blood supply and may progressively lead to worsening consequences, from ...
Sep 27, 2023
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Researchers have discovered a new way to treat hepatocellular carcinoma (HCC) the most common type of liver cancer, and the third leading cause of cancer death worldwide.
Sep 26, 2023
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Carotid artery disease occurs when the blood vessels supplying your brain and head, known as carotid arteries, are damaged or blocked by fatty deposits. These deposits contain cholesterol that organizes as a plaque, which ...
Sep 20, 2023
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The American Red Cross said Monday that it urgently needs blood donations because the national blood supply has dropped nearly 25 percent since early August.
Sep 12, 2023
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People suffering with osteoarthritis currently have only two treatment options: pain management and joint surgery. Both options can have complications and neither targets the disease's root causes.
Sep 7, 2023
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Dementia is a group of brain diseases that share similar symptoms, such as memory, language, orientation, and behavioral issues. Vascular dementia generally develops in the elderly, affecting between 1% and 4% of people over ...
Sep 4, 2023
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Scientists have spotted an elevated risk of stroke in women who became pregnant after fertility treatments.
Aug 31, 2023
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Of all the joints in the body, the knees get the most wear and tear. Decades of walking, running, sitting, jumping and other activities can take a toll on the cartilage—the smooth tissue between the bones—leading to osteoarthritis. ...
Aug 22, 2023
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There is new evidence that bolsters a possible link between e-cigarette use and increased risk of stroke, according to researchers from the University of Colorado Boulder. Their study, conducted in humans, showed that circulating ...
Aug 15, 2023
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Patients often experience functional decline after an ischemic stroke, especially due to the brain's resistance to regenerate after damage. Yet, there is still potential for recovery as surviving neurons can activate repair ...
Aug 10, 2023
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The circulatory system is an organ system that passes nutrients (such as amino acids and electrolytes), gases, hormones, blood cells, nitrogen waste products, etc. to and from cells in the body to help fight diseases and help stabilize body temperature and pH to maintain homeostasis. This system may be seen strictly as a blood distribution network, but some consider the circulatory system as composed of the cardiovascular system, which distributes blood, and the lymphatic system, which distributes lymph. While humans, as well as other vertebrates, have a closed cardiovascular system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open cardiovascular system. The most primitive animal phyla lack circulatory system. The lymphatic system, on the other hand, is an open system.
The main components of the human circulatory system are the heart, the blood, and the blood vessels. The circulatory system includes: the pulmonary circulation, a "loop" through the lungs where blood is oxygenated; and the systemic circulation, a "loop" through the rest of the body to provide oxygenated blood. An average adult contains five to six quarts (roughly 4.7 to 5.7 liters) of blood, which consists of plasma, red blood cells, white blood cells, and platelets. Also, the digestive system works with the circulatory system to provide the nutrients the system needs to keep the heart pumping.
Two types of fluids move through the circulatory system: blood and lymph. The blood, heart, and blood vessels form the cardiovascular system. The lymph, lymph nodes, and lymph vessels form the lymphatic system. The cardiovascular system and the lymphatic system collectively make up the circulatory system.
This text uses material from Wikipedia, licensed under CC BY-SA
