Define and briefly explain organ specific

16. Define and briefly explain organ-specific angiogenesis?
17. Explain briefly the concept of stem cell.
18. What is AGM and what is its role?
19. What are hematopoietic inductive environments and what is their role in the
differentiation of HSCs into different lineages?

20. What is derived from the endodermal germ layer?
21. Name three organs that develop as outgrowths of the early digestive system and name
one function for each of these organs.
22. Amniote eggs have a variety of adaptations to development inside the mother’s body (or
on land). For each of these adaptations state the germ layer origin(s) and the
environmental problem it targets.
23. GENERAL QUESTION: Cells make multiple transitions during development between
epithelial and mesenchymal states. There are also many examples of communication
between epithelial and mesenchymal structures. Think about example(s) for each of these
two different occurrences, and about itheir role in development. (Keep in mind that
transitions are not the same as communications. First define transitions and
communications; only when you become comfortable with the meanings of those words
try to answer the question.)