In which kingdom are fungi primarily classified?

Fungi are primarily classified in their own distinct kingdom known as the Fungi Kingdom. This classification is significant because fungi possess unique characteristics that differentiate them from organisms in the Plant and Animal Kingdoms. Unlike plants, fungi do not undergo photosynthesis; they obtain nutrients through absorption from organic matter, often decomposing dead organisms in their environment. Furthermore, their cell walls contain chitin, rather than cellulose, which is found in plant cell walls. This distinctive cellular structure and their mode of nutrition are key factors that support the classification of fungi as a separate kingdom.