PSY210H5 Chapter Notes - Chapter 3: Tetracycline Antibiotics, Vaginal Bleeding, Globulin
Document Summary
Conception takes place during or within a few days of woman"s ovulation. Ovum, once released from ovaries, lives 3-5 days: the zygote. The developing organism from the time the sperm and egg unite to 2nd week of gestation. Proceeds down mother"s fallopian tube and implants in wall of uterus. Zygote begins a physiological dependence with the mother: the embryo. Differentiation of the major physiological structures and systems. Period of rapid growth (beginning of the third week) The rapid growth and differentiation make the developing fetus make the embryo particularly susceptible to environment assault. Head begins to take shape, followed by eyes and mouth. Blood vessels that will become the heart being to pulsate. Buds that will form arms and legs appear. Neutral folds (formations that evolve into the cns) begin to close. Spina bifida: prevention from the closing of the neutral folds. Spinal cord and membranes that protect it may protrude from the spinal column.
