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~Organisms must also remove waste materials from these cells. The specialized transport system that organisms use to get these jobs done is called the circulatory system.
~three main components:Blood vessels(system of channels or tubes for blood), heart(main organ,pump that moves the blood through vessels),
~ Many invertebrates, including insects, spiders, crustaceans, snails, and clams, have an open circulatory system
~ closed circulatory system, the blood stays enclosed in blood vessels
~three types of blood vessels: arteries, veins, and capillaries
~Blood leaves the heart through arteries
~Heart chambers that pump blood out to arteries are called ventricles
~Heart chambers that receive blood coming back from veins are called atria
~In land vertebrates, including humans, the circulatory system has two loops
~ circulatory system not only delivers nutrients and oxygen to cells, it removes wastes too
~ Blood in the capillaries carries wastes through the veins and back to the heart
~ Carbon dioxide is removed in the pulmonary circuit of the circulatory system. Blood moves from the heart to the lungs, where the blood releases the carbon dioxide and obtains oxygen. Other wastes are filtered out of the blood by the kidneys in the excretory system.
~ Like animals, plants grow and develop, so their cells need nutrients too. Do plants have a circulatory system for transporting nutrients to and from cells? Yes, they do. Plants have a series of tubes within their stems, stalks, or trunks that carry water and nutrients from the roots to each leaf of the plant and carry sugars back down to the roots.
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