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en.wikipedia.org/wiki/Systemic_circulation

The circulatory system of the blood is seen as having two components, a systemic circulation and a pulmonary circulation. 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.

en.wikipedia.org/wiki/Capillary

A capillary is a small blood vessel from 5 to 10 micrometres (µm) in diameter, and having a wall one endothelial cell thick. They are the smallest blood vessels in the body: they convey blood between the arterioles and venules. These microvessels are the site of exchange of many substances with the interstitial fluid surrounding them.

www.healthline.com/health/function-of-capillaries

Capillaries are small but they have several important functions. We'll go over the functions of different types of capillaries and what can happen when they don't work properly.

www.verywellhealth.com/what-are-capillaries-2249069

The capillaries are responsible for facilitating the transport and exchange of gasses, fluids, and nutrients in the body. While the arteries and arterioles act to transport these products to the capillaries, it is at the level of capillaries where the exchange takes place.

study.com/academy/lesson/capillaries-function-definition...

Capillaries are found in every square inch of the body, from the skin to the deepest tissues in the body's cavities. There are between 60,000 to 100,000 miles of blood vessels stretching ...

opentextbc.ca/.../20-1-structure-and-function-of-blood-vessels

The Cardiovascular System: Blood Vessels and Circulation. 131 20.1 Structure and Function of Blood Vessels Learning Objectives. By the end of this section, you will be able to: Compare and contrast the three tunics that make up the walls of most blood vessels;

icardio.ca/en/articles/anatomy/the-systemic-capillaries

The systemic capillaries are the junction points between the arteries and the veins of the great circulation. It is at that this microscopic level that breathing and feeding of the cells of the human body occur. Cell needs . The heart is a pump that makes the blood circulate throughout the human body.

www.reference.com/science/main-function-capillaries-bd9e60...

The main function of capillaries is enabling the exchange between water, oxygen, carbon dioxide, nutrients and many other substances between blood and the surrounding tissues. The capillaries also connect the arterioles and venules to create uninterrupted blood flow through the body.

www.visiblebody.com/learn/circulatory/circulatory...

One set of blood vessels circulates blood through the lungs for gas exchange. The other vessels fuel the rest of the body. Read on to learn more about these crucial circulatory system functions. 1. There Are Two Types of Circulation: Pulmonary Circulation and Systemic Circulation. Pulmonary circulation moves blood between the heart and the lungs.

www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0023062

The systemic circulation provides the functional blood supply to all body tissue. It carries oxygen and nutrients to the cells and picks up carbon dioxide and waste products. Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body.