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

/ sûr′kyə-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.

Word History and Origins

Origin of circulatory system¹

First recorded in 1860–65

Example Sentences

Researchers generated three-dimensional images of miniature brain regions, digestive glands, a primitive circulatory system and even traces of the nerves supplying the larva’s simple legs and eyes.

From BBC

Until now, there has been concern that anaesthetic drugs could have a negative impact on the circulatory system, which has only just been restored.

From Science Daily

One of those layers, the mesoderm, forms during gastrulation and gives rise to muscles, bones, and the circulatory system.

From Science Daily

Notably, researchers saw several signs of trouble in the brain's circulatory system.

From Science Daily

From there, they can migrate to the circulatory system, and then spread and potentially affect every system in the body.

From Salon