and Verified Answers 100%
Prenatal stages of development - ✔✔germinal stage
embryonic stage
fetal stage
Germinal Stage - ✔✔-first 14 days
-zygote
-blastocyst implants in the uterus
embryonic stage - ✔✔-weeks 3-8
-embryo
-major organs constructed
-fast paced
-circulatory system is formed around week 3
-CRITICAL PERIOD OF DEVELOPMENT
fetal stage - ✔✔-week 9 to birth
-baby grows dramatically
-body structures refined
-slow paced
-hair follicles, nails, eyebrows grow
-building blocks of brain development
age of viability - ✔✔22 weeks
, -earliest date for possibility of survival
fertilization - ✔✔union of the sperm and egg
implantation - ✔✔blastocyst becomes embedded in the wall of the uterus
blastocyst - ✔✔hollow ball of cells
zygote - ✔✔fertilized ovum
neural plasticity - ✔✔ability of a brain to use other areas to compensate for injured parts
very low-birth-weight - ✔✔less than 3 1/4 pounds
teratogen - ✔✔a substance that crosses the placenta and harms the fetus (ex. disease,
medication, alcohol)
pregnancy symptoms - ✔✔-missed period
-morning sickness
-nausea
prenatal brain development - ✔✔-during the first four years of our lives, our brain volume
quadruples
neuron - ✔✔specialized nerve cell that receives, processes, and transmits information to other
cells in the body