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blood-vessel

Blood Vessel: arteries, veins, and capillaries

Blood Vessel: arteries, veins, and capillaries

Blood vessels are the pathways through which blood circulates throughout the body. They transport oxygenated blood from the heart to other parts of the body and return deoxygenated blood back to the heart. There are three types of blood vessels: arteries, veins, and capillaries.

Arteries are responsible for transporting oxygenated blood from the heart to other body parts. They have thick muscular walls which enable them to withstand the high pressure generated by the heart. They are typically wider than veins and carry oxygen-rich blood away from the heart.

Veins return deoxygenated blood back to the heart. They are typically thinner than arteries and have valves that prevent backflow. They return blood at a lower pressure than arteries.

Capillaries are very small blood vessels that connect arterioles and venules. They exchange oxygen, hormones, and other substances between cells and the bloodstream.

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References

  • Thieme Atlas of Anatomy: General Anatomy and Musculoskeletal System. Thieme Medical Publishers, Inc., 2019.
  • Blood vessels: Structure and Function". Khan Academy, https://www.khanacademy.org/test-prep/mcat/organ-systems/cardiovascular-system/a/blood-vessels-structure-and-function. Accessed July 24, 2020.
  • "The Three Types of Blood Vessels". News-Medical.net, https://www.news-medical.net/health/The-Three-Types-of-Blood-Vessels.aspx. Accessed July 24, 2020.