Chapter 4 Vocab Flashcards
(27 cards)
Sperm
Male sex cell
Ovum
Female sex cell; also called the egg
Conception
Union of the ovum and the sperm cells
Zygote
A single cell formed at conception; also called a fertilized egg
Fallopian Tubes
Two hollow tubes that connect to the uterus and have finger like projections that reach toward each ovary
Uterus
Organ in which the baby develops and is protected until birth
Genetic Factors
Traits that are passed through the genes
Chromosomes
Threadlike structures that carry genes in living cells
Dominant traits
Traits that always show in a person even if only one gene of the pair is inherited for that trait
Recessive trait
Traits that typically do not show in a person unless both genes for the trait are inherited
Multiple pregnancy
Pregnancy in which two or more babies develop
Fraternal
Term used to describe children from multiple pregnancies who develop from two or more fertilized ova and differ in genetic makeup
Chorion
Membrane that surrounds the baby in the uterus
Identical
Term used to describe children from the multiple pregnancies who develop from one fertilized ovum and have the same genetic makeup
Prenatal Development
Development that takes place between conception and birth
Germinal Stage
First stage of prenatal development, lasting about two weeks after conception
Amnion
Fluid-filled sac that surrounds the baby in the uterus
Placenta
Organ filled with blood vessels that nourish the body in the uterus
Umbilical Cord
Cord that connects the baby to the placenta
Embryonic Stage
Second stage of prenatal development, lasting about six weeks
Embryo
Medical term used to describe the unborn baby in the embryonic stage of development ( week 3 through 8 of pregnancy )
Cartilage
Soft, elastic, flexible tissue that provides structure for the body
Fetal Stage
The third stage of pregnancy, lasting from about nine weeks after conception until birth
Fetus
Medical term used to describe the unborn baby in the fetal stage of development (week 9 until the end of pregnancy)
