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The reproductive system ensures the survival of the species. Other systems in the body, such as the endocrine and urinary systems, work continuously to maintain homeostasis for the survival of the individual. An individual may live a long, healthy, and happy life without producing offspring, but if the species is to continue, at least some individuals must produce offspring.
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The oviduct epithelium is made up of two types of cells. The ciliated cells take precedence and help to move the ovum away from the ovary and toward the uterus. Non-ciliated secretory cells, also known as peg cells, secrete a secretion that lubricates the tube while also feeding and protecting the traveling ovum.