Holozoic nutrition

Holozoic nutrition

Holozoic nutrition (Gr. "holo", whole + "zoikos", of animals) is a method of nutrition that involves the ingestion of liquid or solid organic material. This method suggests phagocytosis where the cell membrane completely surrounds a food particle. [Hickman, Cleveland, and Larry Roberts. "Integrated Principles of Zoology". 13th ed. Boston: McGraw Hill, 2006.]

Most of the free living animals including man show this type of nutrition. In this mode of nutrition, the food may be a small bacterium, a plant or an animal. Here,the food is first taken into the body through an opening called mouth (ingestion), then it is converted into a simple and soluble form by various enzymes (digestion), simplified products thus formed are then absorbed (absorption) and finally the undigested part of food is removed from the body (egestion).

References


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  • holozoic — Animal like in mode of obtaining nourishment, lacking photosynthetic capacity; denoting certain protozoans, in distinction to others that are holophytic. [holo + G. zoon, animal] * * * ho·lo·zo·ic .hō lə zō ik, .häl ə adj characterized by food… …   Medical dictionary

  • holozoic — adjective Date: 1885 characterized by food procurement after the manner of most animals by the ingestion of complex organic matter < holozoic nutrition > …   New Collegiate Dictionary

  • holozoic — adjective obtaining nourishment as animals do by ingesting complex organic matter • Ant: ↑holophytic * * * |hälō|zōik, |hōl adjective Etymology: hol + zoic : obtaining food after the manner of most animals by ingesting complex organic matter :… …   Useful english dictionary

  • holozoic — adjective Obtaining nutrition, as most animals, by the ingestion of organic matter. Syn: heterotrophic …   Wiktionary

  • Saprotrophic nutrition — Mycelial cord made up of a collection of hyphae; a key part in the process of saphrotrophic nutrition, it is used for the intake of organic matter through its cell wall. The network of hyphae is referred to as a mycelium, which is fundamental to… …   Wikipedia

  • Heterotrophic nutrition — Heterotrophic nutritionAnimals, fungi, many prokaryotes and protoctists are unable to synthesize organic compounds to use as food. They are called heterotrophs.Heterotrophic organisms have to acquire and take in all the organic substances they… …   Wikipedia

  • protist — protistan /proh tis teuhn/, adj., n. protistic, adj. /proh tist/, n. any of various one celled organisms, classified in the kingdom Protista, that are either free living or aggregated into simple colonies and that have diverse reproductive and… …   Universalium

  • holophytic — Having a plantlike mode of obtaining nourishment; denoting certain photosynthesizing protozoans, e.g., Euglena. [holo + G. phyton, plant] * * * ho·lo·phyt·ic fit ik adj obtaining food after the manner of a green plant: PHOTOAUTOTROPHIC… …   Medical dictionary

  • holophytic — adjective That can obtain nutrition without the ingestion of food Ant: holozoic See Also: holophyte …   Wiktionary

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