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chapter 51-3.

vocabulary

TermDefinition
gestation the process of carrying young from fertilization to birth
blastocyst the modified blastula stage of ammalian embryos
implantation the process by which the newlt fertilized egg in the blastcyst stage embeds itself in the lining of the uterus
pregnancy the period of time between implantation and birth
trimester one of the three equal periods of about 12 weeks into which the human gestation period is divided
embryo organism in the early stage of development of plants and animals; in humans a developing individual referred to as from the second to eigth week of pregency
amniotic sac sac formed by the amnion
chorionic villi projection of the chorion that extend into the uterine lining
placenta structure that attaches a developing fetus to the uterus and enables the exchange of nutrients, wastes and gases between the mother and the fetus
umbilical cord structure that connects an embryo and then the fetus to the placenta and through which blood vessels pass
human chorionic gonadotropin hormone that is secreted by the placenta and stimulates ovulation and secretation of progesterion and testosterone
fetus developing human during the period from eight week of fertilization until birth
labor process by which the fetus and the placenta come out of the uterus
afterbirth remains of the placenta and the membranes which are expelled from the mothers body following birth
Created by: mccuddenm16
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