HLSC 1170 Midterm: Test 2
25 Mar 2020
School
Department
Course
Professor
Document Summary
Introduction (page 148): prenatal development provides the foundation for development throughout the life span. Longest period, extending from approximately the 9th week after conception until the moment of birth. Development of body structure in the embryonic period (page 155): the embryonic period begins at the close of the 2nd week, with the embryo securely implanted in the uterine endometrium, and continues throughout the 8th week. Mesodermal structures (page 158): the mesoderm is the middle layer of the embryonic disk. It is called the cephalocaudal folding of the embryo: the outermost cells of the ectoderm will begin to differentiate into epidermal cells while nervous system development continues. It will remain connected to the yolk sac through the yolk stalk. Development of body structure in the fetal period (page 162): the end of the 8th week and the beginning of the 9th week signal one of the most important milestones in prenatal development.
