Q. Consider the following statements:
- Phagocytosis is the process by which certain living cells called phagocytes ingest other cells.
- Amoeba and white blood cell are examples of phagocytes.
- Phagocytosis can be a means of feeding.
Which of the statements given above is/are correct?
Answer:
1, 2 & 3
Notes:
- Phagocytosis is the 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).