PSY210H5 Lecture Notes - Lecture 2: Birth Weight, Shoulder Presentation, Neonatal Behavioral Assessment Scale
Document Summary
Characterized by clump of cells toward inside of cell. Main job protects collection of cells inside from outside influences that: 1: ovulation might cause harm. An egg cell from the ovary enters the fallopian tube at 9-16 days of the menstrual cycle: 2: fertilization. Takes place in upper third of the tube, w/in 24 hrs after ovulation: 3: 24-30 hrs after fertilization. Male (sperm) and fem (egg) chrom material unite: 4: egg cell divides for first time, 5: 36 hrs after fertilization. 2 cells: 6: 48 hrs after fertilization. A cluster of 16-32 cells: 8: 4 days: A hollow ball of about 100 cells: 9: 4-5 days: Zygote begins to attach to wall of uterus: 11: 12-14 days: Zygote is completely implanted in the uterine wall: end of the period of the zygote. Cells that are going to become the baby. Key prenatal structures for sustaining the embryo/fetus: amniotic fluid, fetus, placenta.
