Conception ovum and sperm. Mature human sperm. Human ovum - female egg. Fertilization is the union of an ovum and a spermatozoon. A chromosome with genes that affect sexual traits.

Conception ovum and sperm. Mature human sperm. Human ovum - female egg. Fertilization is the union of an ovum and a spermatozoon. A chromosome with genes that affect sexual traits. - 46196182

Human digestive system. Vector illustration of human digestive system. Human digestive system.

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