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Chapter 4: Pregnancy

TermDefinition
Cell The smallest unit of life that is able to reproduce itself.
Sperm The male sex cell.
Ovum The female sex cell; also called the egg.
Conception The union of the ovum and sperm cells.
Zygote The single cell formed at conception; also called a fertilized egg.
Fallopian Tubes Two hollow tubes that connect to the uterus and have fingerlike projections that reach toward each ovary.
Uterus The 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 inherited for that trait.
Recessive Traits 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 decribing children from multiple pregnancies who develop from two ova and differ in genetic makeup.
Chorion Membrane that surrounds the baby in the uterus.
Idential Term describing children from multiple pregnancies who develop from one fertilized ovum and have the same genetic makeup.
Prenatal Development The development that takes place vetween conception and birth.
Germinal Stage The first stage of prenatal development, which lasts about two weeks after conception.
Amnion A fluid-filled sac that surrounds the baby in the uterus.
Placenta An organ filled with blood vessels that nourishes the baby in the uterus.
Umbilical Cord The cord that connects the baby to the placenta.
Embryonic Stage The second stage of prenatal development, which lasts about six weeks.
Embryo Term used to describe a baby in the embryonic stage of development.
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 Term used to describe a baby in the fetal stage of development.
Quickening Movements of the fetus that can be felt by the mother.
Age of Viability The age at which most babies could survive if they were born (28th week of pregnancy).
Created by: AndersenM
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