EXCI 218 Lecture Notes - Lecture 3: Zona Pellucida, Fallopian Tube, Ovarian Follicle
15 May 2016
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Conception: sperm travels from vagina up uterus to the fallopian tubes, sperm only viable for 3 days, union of egg and sperm marks point of conception. From- life"s greatest miracle: the gamete"s journey (10:10-20:50) Name at least four factors that can impede successful fertilization of the egg. Periods of prenatal development: germinal period, embryonic period, fetal period. Give examples of when these different signals would be used to build the embryo"s body. Trimesters: pregnancy is arbitrarily broken up into three equal time segments called trimesters, fetal period covers part of first trimester, all of 2nd and 3rd trimesters. Life"s greatest miracle: feeding the fetus (40:32- the end, which organ is responsible for the nutrition of the fetus, certain physical abilities are perfected and may even start to function during the fetal period. Name some those abilities which are mentioned in this segment and whether they are functioning or not: the baby"s need for fat increases quite dramatically.
