E. Long Answers Questions.
1. Describe the circulatory system.
2. Describe the excretory system with labelled diagram. class 4
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The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.
The human excretory system includes all the organs involved in the elimination of wastes such as salts, carbon dioxide and urea produced by the body during homeostasis.
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