Human Development: Birth to Adulthood

Paper Summary:

This paper examines how the human body experiences a wide range of fundamental changes during the transition from prenatal to adult periods of life. It traces the development from conception through adulthood, using prenatal factors, factors of infancy and childhood, and factors of puberty concerning the chromosomal, hormonal, brain structure, gross anatomy, and self-perception changes that are experienced during these phases.

From the Paper:

"The prenatal period of anatomical development usually last for 40 weeks (ten lunar months) and can be divided into a period of cleavage (this is the distribution of the zygote's contents into smaller and smaller cells); an embryonic stage (this stage extends from the second week through the eighth week of development and is characterized by the formation of the placenta, the development of the main internal organs, and the appearance of the major external body structures (Hole 1990). The term embryo describes the fertilized egg during its first seven weeks of existence; the human embryo is usually termed a fetus after the eighth week of development, when the limbs and external features of the head are recognizable."

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