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ADA NBDHE Dental Hygienist

Category - Scientific Basis for Dental Hygiene Practice

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How many types of blood vessels are there?

Explanation

Answer: C - There are three types of blood vessels in the human body. The artery is a collection of thick, smooth muscle cells and is the largest of the blood vessels. Veins are composed of endothelial cells and connective tissue that carries blood in the opposite direction of arteries. Capillaries develop from a simple layer of endothelial cells and a basal lamina.

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