PEDS302 Chapter Notes - Chapter 4: Teratology, Prenatal Development, Chorionic Villus Sampling

• School: University of Alberta
• Department: Physical Education and Sport
• Course: PEDS302
• Professor: Kelvin Jones

Document Summary

Growth and aging change individual constraints: genetic and extrinsic factors combine to influence growth and aging, we observe patterns in growth and aging, universality: patterns that hold for all humans, specificity: individual variation, educators and therapists can make tasks developmentally appropriate. Prenatal development: early development is controlled by genes, normal development, inherited abnormal development, the embryo or fetus is sensitive to extrinsic factors, positive effects, negative effects. Embryonic development: conception to 8 weeks, differentiation of cells to form specific tissues and organs, limbs formed at 4 weeks, human form noticeable at 8 weeks. Fetal development: 8 weeks to birth, continued growth by hyperplasia (cell number) and hypertrophy (cell size, cephalocaudal (head to toe) and proximodistal (near to far, plasticity (capability of taking on a new function) Fetal nourishment: oxygen and nutrients diffuse between fetal and maternal blood in placenta, poor maternal health status can affect fetus.