植物大多含有叶绿素,这些植物能摄取空气中的二氧化碳,吸收泥土中的矿物质来制造食物。利用叶绿素将二氧化碳分解,再利用其中的碳制成糖、淀粉等碳水化合物。这种能制造自身所需的有机物质的植物,称“自养植物”。在自然界,有些植物生来就没有叶绿素,为了生存,必须摄取已被其他植物制造好的有机物,称“异养植物”。寄生植物就是异养植物的一种,它寄生于寄主植物体内,利用吸器伸入寄主植物的“食物道”内,吸取糖分和矿物 Most plants contain chlorophyll, these plants can take in the air of carbon dioxide, absorb minerals in the soil to make food. The use of chlorophyll to carbon dioxide decomposition, reuse of carbon which made of sugar, starch and other carbohydrates. The plant that produces the organic material it needs, called “autotrophs.” In nature, some plants are born without chlorophyll. In order to survive, they must ingest organic matter that has been made by other plants, called “heterotrophic plants.” Parasitic plants is a kind of heterotrophic plant, which parasites in the host plant, the use of inhalers into the host plant “food Road”, to absorb sugar and minerals