What role does phagocytosis play in nutrition of animals?
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Answer:
phagocytosis, process by which certain living cells called phagocytes ingest or engulf other cells or particles. The phagocyte may be a free-living one-celled organism, such as an amoeba, or one of the body cells, such as a white blood cell. In some forms of animal life, such as amoebas and sponges, phagocytosis is a means of feeding. In higher animals phagocytosis is chiefly a defensive reaction against infection and invasion of the body by foreign substances (antigens).
Explanation:
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Answer: Amoeba is a unicellular, freshwater protozoan. Thus, it does not have a mouth. So it uses the following method to ingest food and get the required nutrients.Amoeba possesses a holozoic mode of nutrition and the process is known as phagocytosis. It takes in its food through this process. Initially, it pushes out its pseudopodia ('false feet') so that it can encircle the food. After this, it engulfs the food, thus forming a bag-like structure called food vacuole. The process is known as phagocytosis.
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