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LCE SCIENCE

Ch 7 : The Endocrine Syst & Reproduction Sec: 3 The Human Life Cycle

TermDefinition
embryo a developing human during the first eight weeks after fertilization has occurred
fetus a developing human from the 9th week of development until birth
amniotic sac a fluid filled sac that cushions and protects a developing embryo and fetus in the uterus
placenta a membrane that becomes the link between the developing embryo or fetus and the mother
umbilical cord a rope like structure that forms between the embryo or fetus and the placenta
adolescence the stage of development between childhood and adulthood when children become adults physically and mentally
puberty the period of sexual development in which the body becomes able to reproduce
Created by: LCEclass
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