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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
Ovaries are the primary female reproductive organs. Each ovary is 3.5 cm long, 2 cm wide, and 1 cm thick, like an almond. On each side of the uterus, on the lateral walls of the pelvic cavity, are small depressions called ovarian fossae. Peritoneal ligaments hold them loosely.
Germinal (ovarian) epithelium covers the ovaries. Visceral peritoneum wraps the ovaries. The tunica albuginea lies beneath this layer.