PSYCH 11 Chapter Notes - Chapter 3: Yolk Sac, Amnion, Prenatal Development
15 Jan 2017
School
Department
Course
Professor
Document Summary
Chapter 3 (1) germinal period (2) period of the embryo (3) period of the fetus (g. e. f. ) One-celled zygote multiplies and forms blastocyst (1st week) Structures that feed/protect the organism begin to form (2nd week) Brain and spinal chord appears (3rd- 4th week) Hearts, ribs, backbone, and digestive tract begin to develop (3rd - 4th) External body structures (face, arms, legs, etc) and internal organs form (5th - 8th week) Sense of touch develops (5th - 8th week) Embryo can move (5th - 8th week) New behavioral capacities (kicking, thumb sucking, etc) (13 - 24 weeks) = 2nd trimester. Vernix and lanugo keep fetus"s skin from chapping in the amniotic fl. Brain"s neurons are in place (24 weeks) (25 - 38 weeks) = 3rd trimester. Rapid brain development (neural connectivity and organization) Layer of fat is added under the skin. Antibodies transmitted from mother"s body to fetus. Teratogen: refers to any environmental agent that causes damage during the prenatal period.
