You can think of independent and dependent variables in terms of cause and effect an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.
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<span>Chlamydia is common and can cause infertility. It can lead a Fallopian tube Infection without any signs or symtoms. </span><span />
Answer: In the air sacs
Explanation: Air sacs has a million tiny holes that is were oxygen transfers. Inside the air sacs oxygen moves across paper thin walls to tiny blood vessels called capillaries into your blood
The oxygen enters the bloodstream from the alveoli.