HHP 1110 Lecture Notes - Morula, Blastocyst, Egg Cell

• School: University of Iowa
• Department: Health and Human Physiology
• Course: HHP 1110

Document Summary

Embryology: events of the pre-embryonic period ch 3 a overview. Cell division ( mitosis): increased cell # Cell differentiation: transformation into specific cell types. Cell development: process where cells become fully functional. Embryology: developmental events that occur prior to birth overview of embryology. Prenatal period: the first 38 weeks of human development. Sequence of events occurring from fertilization until birth. Divided into 3 developmental stages: pre-embryonic period, embryonic period, fetal period developmental stages, pre-embryonic period. First 2 weeks after fertilization of egg. Ends w/ implantation in lining of the uterus: embryonic period. All major organ systems begin to develop: fetal period. Ends at birth pre-embryonic period week 1. We are going to assume sperm fertilize ovum. After zygote is formed, it undergoes a series of mitotic divisions called cleavage. At 16-cell stage, the structure is called a morula. Soon after morula enters uterine cavity, it becomes a blastocyst. Fluid filled blastocyst cavity in its center.