EML Chapter 9 Pregnancy Anatomy

gamete

mature germ cell, either sperm or ovum

conception

beginning of pregnancy, when sperm enters the ovum

zygote

cell formed by the union of the sperm & the ovum

embryo

unborn offspring in the stage of development from implantation of the zygote to the end of the eighth week of pregnancy

fetus

unborn offspring from the beginning of the ninth week of pregnancy until birth

gestation

development of a new individual from conception to birth ( Pregnancy)

gestation period

duration of pregnancy normally 38 to 42 weeks which is divided into periods called trimesters

implantation

embedding of the zygote in the uterine linning

placenta

structure that grows on the wall of the uterus during pregnancy & allows for nourishment of the fetus

amniotic sac

membranous bag that surrounds the fetus before delivery

chorion

outermost layer of the fetal membrane

amnion

innermost layer of the fetal membrane

amniotic fluid

fluid within the amniotic sac which surrounds the fetus

umbilicus

navel, marks the site of attachment of the umbilical cord to the fetus