PSY 105- Final Exam Guide - Comprehensive Notes for the exam ( 52 pages long!)
Document Summary
Prenatal development and the newborn period: conception, egg meets sperm, human egg cell is the largest in the body, germinal, embryonic, fetal (phases in order, embryonic stage, day 4. Inner cell mass arranged into a hollow sphere: end of week 1. Implantation in uterine lining: during week 2. Inner cell mass differentiates into 3 layers: top layer is nervous system, middle is muscles and bones, bottom is digestive, lungs, and other glands, after implantation, neural tube created: brain, spinal cord. Fetus at 9 weeks: rapid brain growth, all internal organs present, sexual differentiation starts. Fetus at 11 weeks: heart achieves basic heart structure, spine and ribs visible, major divisions in brain. Fetus at 16 weeks: growth in lower body of fetus accelerates, movement increases breathing movement, reflexes, external genitalia. Fetus at 18 weeks: covered in fine hairs, greasy coating to protect skin, thumb sucking visible.
