Definition
A haustorium is a specialized structure formed by some parasitic plants and fungi. It penetrates the tissues of a host organism to absorb nutrients. It's like a biological straw, allowing the parasite to tap into the host's resources. Think of it as a sneaky invader, siphoning off energy. This structure is crucial for the parasite's survival, enabling it to thrive at the host's expense. Essentially, it's a nutrient thief!