Chapter 4 Human Dev

Term Definition
Cell The smallest unit of life that is able to reproduce itself
Sperm The male sex cell
Ovum The female sex cell
Conception The union of the ovum and sperm cells
Zygote The single cell formed at conception
Fallopian Tubes Two hollow tubes that connect to the uterus and have finger like projections that reach toward each ovary
Uterus The organ in which the baby develops and is projected until birth
Genetic Factors Traits that are passed through the genes
Chromosmes 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 Traits Traits that typically do not show in a person unless both genes for the trait are inherited
Multiple Pregnancy Two or more babies are developed
Fraternal Children that develop from two different ova
Chorion Membrane that surrounds the baby in the uterus
Identical Children that develop from the same ova
Prenatal Development The fetus' development
Germinal Stage The first stage of prenatal development
Amnion Fluid filled sac that surrounds the baby
Placenta Organ that provides nutrients to the baby
Umbilical Cord Cord that connects baby to placenta
Embryonic Stage Second stage of prenatal development
Embryo A baby in the embryonic stage
Cartilage Structure for the body
Fetal Stage Third stage of pregnancy
Fetus A baby in the fetal stage
Quickening Movements of the baby felt by the mother
Age of Viability Earliest age the baby could survive

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