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REPRODUCTION II
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What happens if the egg isn´t fertilised?
They are released by a process called menstruation.
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What gamete is the biggest?
Egg
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When does the menopause start approximately?
Around 50 years old.
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The nucleus of the egg is protected by.... a membrane b skin c. sperm
a
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Say one thing that occurs in the first trimester.
The brain begins to develop.
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The fertilisation takes place in the uterus.
False. Fallopian tubes.
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Where does the fertilization take place?
Fallopian tubes
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...... connects the placenta to de baby.
Unbillical cord
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When is the placenta expelled in Labour?
Delivery
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How long does pregnancy last?
About 9 months.
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How many stages are there in fetilisation?
5
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Name the three parts of Labour
Dilation, Expulsion adn Delivery
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Why has sperm got tail?
To swim in the seminal fluid.
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The zygote starts to divide in the first stage of the fertilisation. True or False?
False. It´s fourth.
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When (trimester) does the foetus open and close its eyes?
Second trimester.
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The male sex cell is .....
sperm
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What is the function of the umbilical cord?
To connect placenta and baby and transport oxigen and nutrients.
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What protects the foetus?
The amniotic fluid.
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How many eggs has a girl got in adolescence?
Between 300.000 and 400.000
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How many sperm do the male roproductive organ produce in a second? a 4000 b 10000 c 400 d. 1000
b
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What is fertilisation?
The union of a female sex cell with a male sex cell.
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Name the parts of the egg.
nucleus and membrane
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In which stage of pregnancy the embryo is called foetus?
First trimester.
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Foetus starts to grow fingers...
In the second trimester.
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Why the eggs and sperm are special cells?
Because each of them contains onluy half of genetic information that is necessary to create a new human being.
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What happens in the third trimester?
The foetus grows and gains weigh.
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