Blood vessels

The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.

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Μέχρι ποια ηλικία μπορούμε να ζήσουμε;

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Βιταμίνες

Πώς το σώμα μας αποκτά τις βιταμίνες;

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