Explain human development, Biology

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Explain Human Development?

Human development begins with fertilization, and continues throughout life. Fertilization occurs when two sex cells, a sperm cell and an egg cell, join to form a zygote. Prenatal development lasts nine months, and is divided into embryonic development (the first eight weeks), and fetal development. Postnatal development begins at birth, and continues until death.

 

 


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