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KS3 REPRODUCTION

TermDefinition
proper term for sex cells gametes
male sex cells sperm
female sex cell egg
where sperm are made testes
when an egg is released from the ovary ovulation
when the egg nucleus fuses with the sperm nucleus fertilisation
nucleus cell structure containing genetic material
name for a fertilised egg when it is about 4 days old embryo
the name for the developing baby after 9 weeks gestation foetus
period of development between conception and birth gestation
substances exchanged by the placenta food, oxygen, waste products
organ that provides foetus with oxygen and nutrients and removes waste placenta
effects on foetus of mother smoking less oxygen available, low birth weight, premature birth
effects on foetus of mother drinking alcohol harms nervous system and brain
adaptations of sperm cells a tail, many mitochondria, enzymes that digest egg cell membrane
structure in cells where energy is released during respiration mitochondria
process where the embryo embeds itself in the wall of the uterus implantation
days when a woman is most likely to get pregnant after the egg is released form the ovary
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