Chapter 37 Animal Development

Chapter 37 Animal Development - fetus gastrulaton –...

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Chapter 37 Animal Development Vocabulary Amnion – encloses the embryo of the egg in a watery environment Blastocyst – hollow ball of cells that adheres to the uterus. Outer layer contributes to the placenta, inner layer develops into the embryo chorion – lines the shell of the egg and exchanges oxygen and carbon dioxide between the embryo and the environment chorionic villus – small fingers developed on the chorion that allow blood vessels to pass through cleavage – beginning of the formation of an embryo series of mitotic divisions of a fertilized egg. development differentiation – specialization of cells into types embryonic disc – after implantation the inner cell mass grows and splids forming two fluid filled sacs called this embryonic stem cells – cells containing the entire genetic blueprint for an organism extraembryonic membrane fetal alcohol syndrome
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Unformatted text preview: fetus gastrulaton – process of cell movement implantation – process in which the blastocyst burrows into the wall of the uterus inner cell mass – thick part of blastocyst located on one side labor lactation mammary glands organogenesis – when the ectoderm, mesoderm, and endoderm arrange themselves into the organs characteristic of the animal’s species placenta prolactin Things to know: 1. Where is the human egg usually fertilized? In the mother’s oviduct 2. When does implantation occur? 3. You should know the sequence of developmental stages (cleavage, gastrulation, organogenesis) and in general what takes place in each. 4. Describe the structure of the placenta. 5. What types of substances can cross the placenta and potentially harm the developing fetus? 6. Where do embryonic stem cells come from and how are they useful to medicine?...
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This note was uploaded on 04/06/2008 for the course BIOL 1006 taught by Professor Lipscomb during the Spring '07 term at Virginia Tech.

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