News tagged with blood supply

Related topics: patients · heart attack · cells · blood vessels

The key to stopping sarcomas' spread

When sarcomas become large enough and outgrow their blood supply, they become vulnerable to hypoxia—a lack of oxygen. That adaptation not only enables them to survive the stress of low oxygen—it also enables them to withstand ...

May 12, 2015
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How do neural cells respond to ischemia?

A group of researchers from the Lomonosov Moscow State University, in collaboration with their Irish colleagues from the University College Cork, has studied the early response of cells to ischemia, which is a restriction ...

May 06, 2015
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New York blood shortages casualty of shutdown

New York City issued an urgent call for blood donors Wednesday, saying supplies were low after authorities shut down America's largest city for a winter storm that failed to materialize.

Jan 29, 2015
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FDA to ease ban on blood donations by gay men

Federal officials have moved closer to overturning a decades-old ban on blood donations from gay and bisexual men, but activists say the proposed alternative would continue to stigmatize men who have sex with men.

Dec 23, 2014
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Circulatory system

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

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