Getty Images/iStockphoto “Leeches are blood-sucking endoparasite segmented worms characterized by a small sucker, which contains the mouth, at the anterior end of the body, and a large sucker ...

He allows a leech to attach to his arm and suck his blood, the mouth of the leech is seen close up. The leech multiplies its body mass by six or seven times and will now not need to feed for ...