Chapter 2 slides

Chapter 2 slides - Prenatal Development and the Newborn...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Prenatal Development and the Newborn Period Chapter 2 Prepared and  edited by J. W. Taylor V  and Christina  Kirkman
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Overview Prenatal Development The Birth Experience The Newborn Infant
Background image of page 2
Prenatal Development Conception, Developmental Processes, and Early Development Fetal Behavior, Experience, and Learning Hazards to Prenatal Development
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Changing Ideas Over Time Aristotle rejected the prevailing idea that the individual was preformed at the start of life in favor of epigenesis , the idea that there is an emergence of new structures and functions during development Recently developed research techniques and an increased understanding of genetics have led to a revolution in embryology , the study of prenatal development
Background image of page 4
Sex Differences Begin at Conception Approximately 120 to 150 males are conceived  for every 100 females because the sperm  bearing the Y chromosome are lighter and swim  faster to the egg than those bearing an X  chromosome However, male embryos are miscarried at higher  rates than female embryos, and boys are more  vulnerable to developmental disorders – an X  and a Y = mandated expression of what’s on the  X Males are also more vulnerable to illness  throughout the life span
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sex Differences Begin at Conception
Background image of page 6
The Zygote The fertilized egg, or zygote , has a full complement of human genetic material, half from each parent Marks the beginning of the three periods of prenatal development Germinal: Begins with conception and lasts until the zygote becomes implanted in the uterine wall. Rapid cell division takes place. Embryonic: Following implantation, major development occurs in all the organs and systems of the body. Development takes place through the processes of cell division, cell migration, cell differentiation, and cell death, as well as hormonal influences. Fetal: Continued development of physical structures and rapid growth of the body. Increasing levels of behavior, sensory experience, and learning.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Periods of Prenatal Development Germinal (conception - 2 weeks) Embryonic (3 rd  - 8 th  week) Fetal (9 th  week - birth)
Background image of page 8
The Cells Four major developmental processes transform a zygote into an embryo and then into a fetus 1. Cell division results in the proliferation of cells 2. Cell migration is the movement of cells from their point of origin to somewhere else in the embryo 3. Cell differentiation transforms the embryo’s unspecialized stem cells into roughly 350 different types of cells 4. The selective death of certain cells , or apoptosis , also enables prenatal development
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Phylogenetic Continuity The idea that because of our common evolutionary history, humans share some characteristics and developmental processes with other animals, especially mammals
Background image of page 10
The Role of Hormones Hormones play a crucial role in sexual differentiation All human fetuses can develop either male or
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 47

Chapter 2 slides - Prenatal Development and the Newborn...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online