Observation of intestinal mesentery of Frog

Jun 08, 2021 • 8:39 AM UTC

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Microorganisms

Thuận Nguyễn Diệu

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The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products like carbon dioxide. The three basic components of the circulatory system include blood, blood vessels, and the heart. Bloood is pumped by the heart and then flows through the vessels – a net work of interconnecting arteries, arterioles, cappilaries, venules, and veins – back to the heart. With each rhythmic pump, blood is pushed under high pressure and velocity away from the heart, which create a blood pressure on the walls of the vessels.