Chapter 13 - Chapter 13 Prenatal Development and the Newborn Process of reproduction in humans starts with womans ovary releases a mature egg A

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

View Full Document Right Arrow Icon
Chapter 13 Prenatal Development and the Newborn - Process of reproduction in humans starts with woman’s ovary releases a mature egg, - A woman was born with all the immature eggs she will ever have, although only 1 in 5000 will ever be matured and released, a man begins producing sperm cells at puberty for the rest of his life after that he produces sperm cells - 200 million or more sperm cells race to approach the egg that is about 85,000 times the size of itself , after the few reach the egg, they release the digestive enzymes that eat away at the protective coating , as soon as one sperm penetrates, the egg’s surface blocks all others . . before half a day, the egg nucleus and the sperm nucleus fuse - Prenatal Development o Zygotes: fertilized egg. o Few than half of all zygotes survive beyond the first 2 weeks , the cell division until it produces a zygote of some 100 cells within the first week, that is when the cells begin to differentiate and specialize in function and structure o About 10 days after conception, the zygote attaches to the mother’s uterine wall and
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 11/07/2010 for the course PSYCH PSYCH101 taught by Professor John during the Fall '09 term at Waterloo.

Page1 / 2

Chapter 13 - Chapter 13 Prenatal Development and the Newborn Process of reproduction in humans starts with womans ovary releases a mature egg A

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