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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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OVARY
Indistinct borders separate the inner medulla and outer cortex of the human ovary. The medulla includes blood arteries and nerves, whereas the cortex is occupied by follicles in the process of development. This ovary has follicles at varying stages of development. A corpus luteum, the remains of a ruptured follicle that released its ovum into the vaginal canal, is also apparent.