Chapter 4 psyc

Chapter 4 psyc - Chapter 40- Prenatal Development and Birth...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 40- Prenatal Development and Birth Germinal period- first 14 days Embryonic period- 3 rd through 8 th week Fetal period- 9 th week through birth Conception- once a month an ova is released and it goes down the fallopian tube. If there are sperm present the odds are really good that it will be penetrated in the curve of the fallopian tube. The egg is fertilized and it begins to immediately divide. It takes several days to make a trip to the uterine wall. If it is successful and everything goes right the egg will get implanted. Germinal- zygote divides and keep dividing, at least through the 3 rd doubling they are all the same. At the stage of 8 cells, differentiation begins. The early stem cells take on distinct characteristics and they gravitate to locations, foreshadowing the type of cells they will become At about a week after conception the multiplying cells separate into two separate masses. The outer layer forms a shell, which later becomes the placenta, and the inner cells form a nucleus, later the embryo. The first task of out cells is to achieve implantation-imbed themselves into the nutrient environment of the uterus
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/22/2008 for the course PSYC 3305 taught by Professor Ziegler during the Fall '08 term at Kennesaw.

Page1 / 3

Chapter 4 psyc - Chapter 40- Prenatal Development and Birth...

This preview shows document pages 1 - 2. Sign up to view the full document.

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