The heart can be thought of as two pumps that work together to move the blood around a circular course. The main function of the lymphatic system is to cleanse interstitial fluid and to return it to the bloodstream. Systemic infections threaten the transportation of oxygen and nutrients to body tissues and removal of waste products. The circulatory system can expose all the body's tissues to infectious agents and their toxins.
■ What are the functions of the spleen?
■ Which side of the heart, right or left, do bacteria in infected lymph reach first? Where do they go from there?
■ What is the relationship between easily compressed veins, muscle action, and blood flow?
Figure 28.2 Lymphangitis Notice the red streak extending up the arm.The streak represents an inflamed lymphatic vessel.
Chapter 28 Blood and Lymphatic Infections
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