The blood circulatory system, is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate. It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and from Latin vascula meaning vessels), and has two divisions, a systemic circulation or circuit, and a pulmonary circulation or circuit. Some sources use the terms cardiovascular system and vascular system interchangeably with the circulatory system. The network of blood vessels are the great vessels of the heart including large elastic arteries, and large veins; other arteries, smaller arterioles, capillaries that join with venules (small veins), and other veins. The circulatory system is closed in vertebrates, which means that the blood never leaves the network of blood vessels. Some invertebrates such as arthropods have an open circulatory system. Diploblasts such as sponges, and comb jellies lack a
El sistema circulatorio de la sangre, es un sistema de órganos que incluye el corazón, los vasos sanguíneos y la sangre que circula por todo el cuerpo de un ser humano u otro vertebrado. Incluye el sistema cardiovascular, o sistema vascular, que consiste en el corazón y los vasos sanguíneos (del griego kardia que significa corazón, y del latín vascula que significa vasos sanguíneos), y tiene dos divisiones, una circulación sistémica o circuito, y una circulación pulmonar o circuito. Algunas fuentes usan los términos sistema cardiovascular y sistema vascular intercambiablemente con el sistema circulatorio. La red de vasos sanguíneos son los grandes vasos del corazón incluyendo grandes arterias elásticas, y grandes venas; otras arterias, arteriolas más pequeñas, capilares que se unen con venas (venas pequeñas), y otras venas. El sistema circulatorio está cerrado en vertebrados, lo que significa que la sangre nunca abandona la red de vasos sanguíneos.