Chapter 3 Prenatal Development - Andrew Lynn Notes Chapter...

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

Andrew Lynn 2/5/08 Notes: Chapter Three Prenatal Development I. Motivations for Parenthood A. Carry on family name, via boy B. Affectionate relationships C. Someone to take care of you when you get home D. How large? 1. 1-2, 1.8 children 2. Space out children 12 9 5 3. Religion basis 4. Pressure for college, age of women higher, fertility problems, 35 and older problems increase E. Time for Children? II. Prenatal development A. Zygote 1. Lasts about 2 weeks 2. Ends at implantation 3. Blastocyst-60 to 70 cells, fluid filled cell i. Embryonic disk—inner portion of blastocyst, new organism develops (a) Ectoderm—nervous system and skin (b) Mesoderm—muscles, skeletal system, circulatory system and other internal organs (c) Endoderm—digestive system, lungs, urinary tract, and glands ii. Trophoblast—thin outer ring of cells of the blastocyst, becomes the structures that provide protective covering and nourishment to the new organism (a) Amnion (b) Amniotic fluid (c) Yolk sac iii. Placenta—transports food and O2 to the developing organism, takes waste away iv. Umbilical cord B. Embryo 1. Begins at implantation to 8 weeks 2. Most rapid change of growth 3.
Image of page 1

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

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '07
  • MARCHAND

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern