Body defence system

What is the major defense system of the human body? A second line of defense is housed within the body : a finely tuned immune system that recognizes and destroys foreign substances and organisms that enter the body. Pathogens include bacteria, viruses, toxins, parasites and fungi. Start studying Body Defense Systems. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

The skin is the first physical barrier, providing a protective layer that is hard to penetrate.

Bacteria, viruses, spores and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of. In the world where microorganisms are everywhere - including trillions of them in each of us - the body had to develop natural defense against them. The first line of defense against invaders is the body’s surface, which acts as a barrier to germs. There are two systems that specialize in self-defense: the lymphatic system and the immune system.

The innate immune system is a non-specific response that includes deterrents like the skin, enzymes in saliva, and inflammatory reactions by immune cells. Most antigens are proteins that serve as the stimulus to produce an immune response. The term antigen comes from ANTI- body GENerating substances.

B cell or T cell that does not respond the first time that it meets with an antigen or an invading cell but that recognizes and attacks the antigen. LOF Defence Systems has developed soft body armour, hard body armour and carrier systems that keep teams mobile, effective and safe. Our technologies increase protection from kinetic energy transfer, create field-repairable systems and help regulate body temperature. ADVERTISEMENTS: The following points highlight the top ten systems seen in animal body.

Integumentary System 2. The second line of defence is a group of cells, tissues and organs that work together to protect the body. The cells involved are white blood cells (leukocytes), which seek out and destroy disease-causing organisms or substances. This is the immune system.

The human body has two defence systems to fight these pathogens: 1. General defence systeacts against all pathogens. Examples of the general defence system. Specific defence systeattacks particular pathogens.

Skin: provides a barrier to infection. The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. When we talk about Immunity, we are referring to the body ’s ability to resist or get rid of potentially dangerous foreign materials or abnormal cells.

Every organ, from your eyes to your guts, is equipped with physical and chemical barriers to protect it from harm. Autoimmune disorders occur when the immune system fails to distinguish between self and nonself and attacks the tissues or organs of the body.

It consists of mechanisms and agents that target specific antigens (Ags). An antigen is any molecule, usually a protein or polysaccharide, that can be identified as foreign (nonself) or self (such as MHC antigens described below). The white blood cells are a key component. Here, we explain how it works, and the cells, organs.

The next time a known antigen is encountere the adaptive immune system can respond faster. When the immune system is weakened by the virus HIV, it is mostly a specific group of T cells that is reduced in number, the so-called T helper cells. Then the body is especially susceptible to infections by what are usually harmless pathogens. Body Defence - as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online.

The body possesses many mechanisms that impart nonspecific defense. The objectives of these mechanisms are to prevent microorganisms from gaining a foothold in the body and to destroy them if they penetrate to the deeper tissues. Immune System and the Body ’s Defense I. There are main types of primary defences and these are the skin and mucous membranes. Infectious agents that cause harm to the body are often called pathogens.

Our bodies are covered by the skin and this is the first primary defence that we have.