(i) Saprophytic Nutrition: Saprophytic nutrition is that nutrition in which organisms obtain their food from dead and decaying organisms (plants and animals).

Examples: Fungi (mushrooms), and many bacteria.

(ii) Parasitic Nutrition: Parasitic nutrition is that nutrition in which organisms obtain their food from other living organisms (called host).

Examples: Leech, mosquito.

(iii) Holozoic Nutrition: In this mode of nutrition, the digestion happens inside the body of the organism. Most of the animals follow this mode of nutrition.

Example: Human beings