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Child Development

Chapter 4 terms

TermDefinition
1. Cell The smallest unit of life that is able to reproduce itself.
2. Sperm The male sex cell
3. Ovum The female sex cell (egg)
4. Conception The union of the ovum and sperm cells.
5. Zygote The single cell formed at conception (fertilized egg)
6. Fallopian Tubes Two hollow tubes that connect to the uterus and have fingerlike projections that reach toward each ovary
7. Uterus The organ in which the baby develops and is protected until birth
8. Genetic Factors Traits that are passed through the genes
9. Chromosomes Threadlike structures that carry genes in living cells
10. Dominant Traits Traits that always show in a person even if only one gene of the pair is inherited for that trait
11. Recessive Traits Traits that typically do not show in a person unless both genes for the trait are inherited
12. Multiple Pregnancy Pregnancy in which two or more babies develop
13. Fraternal Children from multiple pregnancies who develop from two ova and differ in genetic makeup
14, Chorion Membrane that surrounds the baby in the uterus
15. Identical Children from multiple pregnancies who develop from one fertilized ovum and have the same genetic makeup
16. Prenatal Development The development that takes place between conception and birth
17. Germinal Stage First stage of prenatal development, which lasts about two weeks after conception
18. Amnion Fluid-filled sac that surrounds the baby in the uterus
19. Placenta Organ filled with blood vessels that nourishes the baby in the uterus
20. Umbilical Cord The cord that connects the baby to the placenta
21. Embryonic Stage Second stage of prenatal development, which lasts about 6 weeks
22. Embryo A baby in the embryonic stage of development
23. Cartilage Soft, elastic, flexible tissue that provides structure for the body
24. Fetal Stage Third stage of pregnancy, lasting from about 9 weeks after conception until birth
25. Fetus A baby in the fetal stage of development
26. Quickening Movements of the fetus that can be felt by the mother
27. Age of Viability The age at which most babies could survive if they were born (28th week of pregnancy)
Created by: nreiger
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