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circulatory system

noun

, Anatomy, Zoology.
  1. the system of organs and tissues, including the heart, blood, blood vessels, lymph, lymphatic vessels, and lymph glands, involved in circulating blood and lymph through the body.


circulatory system

noun

  1. anatomy zoology the system concerned with the transport of blood and lymph, consisting of the heart, blood vessels, lymph vessels, etc


circulatory system

/ sûrkyə-lə-tôr′ē /

  1. The system that circulates blood through the body, consisting of the heart and blood vessels. In all vertebrates and certain invertebrates, the circulatory system is completely contained within a network of vessels (known as a closed circulatory system ). In arthropods and many other invertebrates, a substance analogous to blood (known as hemolymph) is pumped through vessels that open into the intercellular spaces (in what is known as an open circulatory system ). In vertebrates, the lymphatic system is also considered part of the circulatory system.


circulatory system

  1. The system in the body by which blood and lymph are circulated. The parts of the circulatory system include the heart , along with all the arteries , veins , and capillaries . The organs of the lymphatic system are also considered to be part of the circulatory system. Nutrients, oxygen , and other vital substances are carried throughout the body by the blood, which is pumped by rhythmic contractions of the heart. Blood is pumped from the heart to the arteries, which branch into smaller and smaller vessels as they move away from the heart. The blood passes oxygen and nutrients to the cells and picks up waste in the capillaries, then returns to the heart via a system of veins.


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Word History and Origins

Origin of circulatory system1

First recorded in 1860–65

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Example Sentences

Bilirubin eventually makes its way to the liver through the circulatory system and is modified and then secreted into the small intestine by the liver in the form of bile.

Once British physician William Harvey mapped the circulatory system in 1628, swapping fluids became a fad.

Once humans stemmed the flow of CFCs, the planet’s circulatory system took over.

I like soft and comfortable things, and my circulatory system is decidedly average.

Cool OffIn addition to freshening up your face and body, showers can help stimulate the circulatory system and metabolism.

He boasted of doing so much drugs that he had enough “running through my circulatory system to sedate Guatemala.”

At the core of their concern was how and what they could pay their people—the lifeblood of the Wall Street circulatory system.

Only animals with a circulatory system can have definite breathing organs—lungs or gills.

His over-developed circulatory system causes the Thoracic to blush easily and often.

The circulatory system of plants is really not quite so elaborately comparable to that of fishes as he supposed.

Before beginning upon the circulatory system, however, she sprang a surprise.

Leofwin, however, whose eye was naturally caught by the pictorial, was gazing at the circulatory system on the wall.

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