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chapter 4 science form 1 4.4 4.3

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  • Why has sperm got tail?
    To swim in the seminal fluid.
  • In which part of the mother´s body does the fetus grow?
    in the uterus
  • How does the fetus recieve oxygen and nutrients?
    placenta
  • How is the baby connected to the placenta?
    Through the umbilical cord.
  • How many sperm can fertilise an ovum?
    Just one
  • How long does pregnancy last?
    About 9 months.
  • What produces egg cells?
    The OVARIES produce egg cells.
  • What happens if the egg isn´t fertilised?
    They are released by a process called menstruation.
  • How is the fetus connected to the placenta?
    UMBILICAL CORD.
  • In which position are babies are usually born?
    head
  • When does the menopause start approximately?
    Around 50 years old.
  • What are the stages of pregnancy after fertilization?
    After fertilization, a ZYGOTE is formed, it divides into an EMBRYO, it develops systems and becomes a FETUS, and when born is a BABY.
  • When the embryo has all the organs formed, it begins to be a ......
    Foetus
  • When an ovum is fertilised and cells start to divide and multiply it's known as....
    Zygote
  • When does an embryo become a foetus?
    in the ninth week of pregnancy
  • What is the name of the process a woman's ovaries and uterus perform every 28 days?
    The MENSTRUAL CYCLE
  • a foetus is in a bag of liquid that is called ......
    amniotic sac
  • What protects the foetus during pregnancy?
    the amniotic fluid, amnion sac, placenta
  • Waste matter and carbon dioxide are transferred to the mother via.....
    umbilical cord
  • Where does a fetus develop?
    A fetus develops in the UTERUS.
  • What connects the ovaries to the uterus?
    The FALLOPIAN TUBES connect the ovaries to the uterus.
  • When sperm fuses an ovum it's known as.....
    fertilisation
  • What is the function of the umbilical cord?
    To connect placenta and baby and transport oxigen and nutrients.
  • How long is a typical pregnancy?
    A typical pregnancy is 9 MONTHS (39/40 weeks)
  • When does fertilisation occur?
    When an ovum and a sperm meet.
  • Where does the fertilization take place?
    Fallopian tubes
  • What is a fertilized egg cell called?
    A fertilized egg cell is called a ZYGOTE.
  • Where does the embryo fix?
    Onto the lining of the uterus.
  • When the embryo has all the organs formed, it begins to be a ......
    Foetus
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