Phagocytosis is the name given to the process where phagocytes (a type of white blood cell found in blood) will ingest invading pathogens or large particles and digest their contents. . The membrane of the phagocyte forms a crater shape around the particle that is to be phagocytised. Phagocytosis is the process where a cell (phagocyte) engulfs a solid particle to form an internal compartment called a phagosome.

The word phagocytosis comes from the Greek phago-, meaning “devouring”, and -cyte, meaning “cell”.Cells in the immune systems of organisms use phagocytosis to devour bodily intruders such as bacteria, and they also engulf and get rid of cell debris. This resource includes: 1: A power point to lead students through the lesson 2: A literacy starter game 3: A modelling activity 4: A student diagram sheet 5: A micro teaching activity Thanks for looking ), complement proteins, inflammatory cytokines, and prostaglandins. monocytes or neutrophils) ingest bacteria:

This lesson describes the sequence of events that occur during the phagocytosis of pathogens and the subsequent destruction by lysozymes. Phagocytosis Steps For simplicity, we will use the example of a white blood cell in the human immune system to illustrate this process. Continue drawing each step of phagocytosis one step at a time. phagocytosis The process by which cells engulf solid matter is called phagocytosis. Phagocytosis, or “cell eating”, is the process by which a cell engulfs a particle and digests it. On the next page, you can now draw the first steps of phagocytosis, as the cell moves toward the item it is going to engulf. -phagocytes perform phagocytosis.-they often travel in the blood, but can move into other tissues if necessary.-the pathogens chemical products attract the phagocytes.-the phagocytes bind to the pathogen's surface.-they engulf the pathogen to form a vesicle called a phagosome. Let us talk about the general steps involved in the process. There are a number of distinct steps involved in phagocytosis: Step 1: Activation of the Phagocyte Resting phagocytes are activated by inflammatory mediators such as bacterial products (bacterial proteins, capsules, LPS, peptidoglycan, teichoic acids, etc. 1. skin, mucosal layer of airways, tears) and enter the body’s tissues. Read and learn for free about the following article: Phagocytosis If you're seeing this message, it means we're having trouble loading external resources on our website. This resource is a lesson with activities covering the phagocytosis section of the 2015 OCR A Level Biology specification. Unlike phagocytosis of apoptotic cells where both professional and non-professional phagocytes may be involved, infection by various invading/ pathogenic microorganisms such as bacteria and viruses triggers immune responses where only professional phagocytes are involved.. The pathogens will have managed to get past the body’s first line of defence (eg.

3. Attack no 1: Inflammation (Yes, this is good!) In the immune system, it is a major mechanism that the body uses to remove pathogenic material. Phagocytosis Definition. In case of unicellular organisms, the process of phagocytosis takes place when the organism comes in contact with nutrient particles. Phagocytosis (from Ancient Greek φαγεῖν (phagein), meaning 'to eat', and κύτος, (kytos), meaning 'cell') is the process by which a cell uses its plasma membrane to engulf a large particle (≥ 0.5 μm), giving rise to an internal compartment called the phagosome.It is one type of endocytosis. The following are steps through which phagocytic cells (e.g. Attack no 1: Inflammation (Yes, this is good!) the response is the same for any pathogen).


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