I need help with this please
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Biology, 22.06.2019 08:20
Which of these parts of the membrane large moecules pass through it ?
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Biology, 22.06.2019 10:00
Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
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