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Natural Science: unit 3

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  • What parts of the respiratory system do numbers 8, 9 and 10 refer to?
    bronchioles, alveoli and capillaries
  • Where are the ova formed?
    In the ovaries
  • Which are the three types of blood vessels?
    Arteries, veins and blood capillaries
  • What parts of the female reproductive system do numbers 1, 2, 3 and 4 refer to?
    ovaries, uterus, vagina and vulva
  • What happens during exhalation?
    The lungs become smaller. Air leaves the body.
    The lungs open up and become bigger. Air leaves the body.
    The lungs become smaller. Air enters the body.
    The lungs become bigger. Air enters the body.
  • What do veins transport?
    They transport blood without oxygen / with carbon dioxide (from the body to the heart)
  • What happens in the alveoli?
    There is an exchange of gases. The oxygen passes into the blood and the carbon dioxide passes into the alveoli.
  • What is the membrane that surrounds the embryo and is filled with liquid?
    The amniotic sac
  • What parts of the male reproductive system do numbers 1, 2, 3 and 4 refer to?
    urethra, penis, testicles and scrotrum
  • Why is the placenta important?
    Because it provides nutrients and oxygen to the baby.
  • What do arteries transport?
    They transport blood with oxygen (from the heart to the rest of the body)
  • Where does the foetus develop?
    In the uterus
  • What parts of the respiratory system do numbers 1, 2, 3 and 4 refer to?
    nostrils, pharynx, larynx and trachea
  • What is created when a spermatozoon fuses with an ovum?
    A zygote
  • How do we call the zygote when it implants in the wall of the uterus?
    Embryo
  • What does the umbilical cord connect?
    The placenta and the embryo/foetus
  • Which is the main organ of the circulatory system? What does it do?
    The heart. It pumps blood around the body.
  • How many cavities does the heart have?
    Four cavities.
  • How does blood move around the body?
    Heart - Arteries (blood with oxygen) - body - veins (blood with carbon dioxide) - heart - lungs - heart
  • What do capillaries connect?
    They connect arteries and veins
  • How long does pregnancy last?
    50 weeks
    30 weeks
    40 weeks
    20 weeks
  • What happens during inhalation?
    The lungs become smaller. Air enters the body.
    The lungs open up and become bigger. Air enters the body.
    The lungs open up and become bigger. Air leaves the body.
    The lungs become smaller. Air leaves the body.
  • What parts of the respiratory system do numbers 5, 6 and 7 refer to?
    bronchi, lungs and diaphragm
  • Where are the spermatozoa formed?
    In the testicles
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