The location and position of the heart in the thoracic cavity. Concept introduction: The circulatory system refers to the cardiovascular system of the body. This system includes heart and the blood vessels. Blood vessels are of three types: arteries, capillaries, and veins. The heart is a muscular organ of the circulatory system which pumps blood throughout the body, and the blood vessels carry the blood within them. Circulatory system provides oxygen and nutrients to all the cells of the body through blood vessels.

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Ch.23 How is Salmonella able to cross from the intestines into the blood? A. it is so small that it can squeeze between intestinal cells B. it secretes a toxin that induces its uptake into intestinal epithelial cells C. it secretes enzymes that create perforations in the intestine D. it can get into the blood only if the bacteria are deposited directly there, that is, through a puncture — Which virus is associated with liver cancer? A. hepatitis A B. hepatitis B C. hepatitis C D. both hepatitis B and C — explain your answer thoroughly

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Question

Chapter 19.2, Problem 5LO

Summary Introduction

To describe: The location and position of the heart in the thoracic cavity.

Concept introduction: The circulatory system refers to the cardiovascular system of the body. This system includes heart and the blood vessels. Blood vessels are of three types: arteries, capillaries, and veins. The heart is a muscular organ of the circulatory system which pumps blood throughout the body, and the blood vessels carry the blood within them. Circulatory system provides oxygen and nutrients to all the cells of the body through blood vessels.

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