
To review:
The difference between an open and closed circulatory system and the reason behind the inability of humans to function with an open circulatory system.
Introduction:
Different organisms possess different kinds of circulatory systems, which have evolved into two different types of the circulatory systems, which are closed and open circulatory system. Open circulatory system is one where body tissues and organs are surrounded by a fluid called hemolymph. This type of circulatory system is mainly found in invertebrates except for earthworm. The closed circulatory system has blood vessels. These blood vessels run transversely through the body and transport oxygen and blood to different organs.

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Chapter 44 Solutions
Biology: The Dynamic Science (MindTap Course List)
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