circulatory system

three independent systems that work together: cardiovascular, pulmonary and systemic

AI overview

Your circulatory system is made up of three independent systems working together—the cardiovascular system (your heart and blood vessels), the pulmonary system (which moves blood to and from your lungs), and the systemic system (which delivers blood throughout your body)—all of which work to transport oxygen, nutrients, and other vital materials where they need to go. This matters because without your circulatory system constantly moving these essential substances through your body, your cells and organs couldn't function.

AI-generated from the Wikipedia summary — may contain errors.

Research

1,569,033 papers

The Insect Circulatory System: Structure, Function, and Evolution.ReviewAnnual review of entomology · 2020Hillyer JF, Pass GDOI: 10.1146/annurev-ento-011019-025003
Window to the circulatory system: Ocular manifestations of cardiovascular diseases.ReviewEuropean journal of ophthalmology · 2020Singh RB, Saini C, Shergill S et al.DOI: 10.1177/1120672120914232
Mass Transport: Circulatory System with Emphasis on Nonendothermic Species.ReviewComprehensive Physiology · 2016Crossley DA, Burggren WW, Reiber CL et al.DOI: 10.1002/cphy.c150010
1D-model of the human liver circulatory system.Computer methods and programs in biomedicine · 2023Rojas AMT, Lorente SDOI: 10.1016/j.cmpb.2023.107612
Biological effects of high-LET irradiation on the circulatory system.ReviewInternational journal of radiation biology · 2025Saigusa Y, Little MP, Azimzadeh O et al.DOI: 10.1080/09553002.2025.2470947
Overview of the 2023 FDA Circulatory System Devices Advisory Panel Meeting on the Symplicity Spyral Renal Denervation System.ReviewAmerican heart journal · 2024Chitturi KR, Haberman D, Wermers JP et al.DOI: 10.1016/j.ahj.2023.12.005
Microfluidic platforms for modeling biological barriers in the circulatory system.ReviewDrug discovery today · 2018Yu F, Selva Kumar ND, Choudhury D et al.DOI: 10.1016/j.drudis.2018.01.036
Risk of diseases of the circulatory system after low-level radiation exposure-an assessment of evidence from occupational exposures.Journal of radiological protection : official journal of the Society for Radiological Protection · 2022Wakeford RDOI: 10.1088/1361-6498/ac6275

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Wikidata facts

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Commons category: Cardiovascular system

Sources (6)

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Article

In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels). The circulatory system 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 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. Many invertebrates such as arthropods have an open circulatory system with a heart that pumps a hemolymph which returns via the body cavity rather than via blood vessels. Diploblasts such as sponges and comb jellies lack a circulatory system.