Physical Development Across the Lifespan

What this topic is about

Tim traces physical development from prenatal growth through infancy, adolescence, adulthood, and aging. He uses reflexes and developmental milestones to show how bodies change and how early experiences can matter. He also describes prenatal influences and milestones in motor development, placing physical change across multiple stages.

Key ideas

• Prenatal development begins at conception; genetic, maternal, and environmental factors can influence it.
• Newborn reflexes such as rooting and sucking support early behavior.
• The video describes infant motor development and the visual cliff study of depth perception.
• Puberty includes reproductive changes such as menarche and spermarche.
• The review also notes physical changes associated with aging.