Ch. 22 Congenital and Childhood Disorders Flashcards
Normal Pregnancy and Gestation: weeks 1-8
organs are formed (embryo stage)
Normal Pregnancy and Gestation:Weeks 9-13
face and limbs
Normal Pregnancy and Gestation:2nd trimester
rapid growth
Normal Pregnancy and Gestation:3rd trimester
maturation, refinement
placenta has ( ) plates
fetal and maternal
acts as fetal lungs, kidneys, GI tract
placenta
provides O2 and nutrients, diposes of metabolic wastes
placenta
job of gene
to make a protein
chromosomes: 22 pairs, govern all but gender
autosomes
chromosomes: gender determination
sex (X, Y)
critical thing about stem cells
asymetrical division
cells: all tissues but germ cells of ovary/testis
somatic
cells: stem cells that produce ova and sperm
germ cells
only ( ) chromosome defects are transmissible
germ cell
germ cell chromosome defects maybe be sex-link but most are…
autosomal
change from preestablished point
deformations
not well made from the beginning
malformations
deformation are caused by ( ) factors
mechanical
normal pregnacy= ( ) weeks
40-42 weeks from LMP
each trimester how long
~13 weeks
malformations caused by ( ) factors, which cause failure of embryologic
environmental (not transmissible) or genetic (transmissible)
space to close: neural tube doesn’t close
spinda bifida
tissue to divide:
syndactyly
structure to disappear:
thyroglossal duct cyst