the muscle
The body's first line of defense against infection is the skin.
The skin is the first line of defence( protection) that is why lesion in the skin leads to infection.
its killer T cells
The skin is essentially the first line of defence, forming a physical barrier against bacterial invasion.
The difference between the first and second line of defence is that the first line of defence is your physical barrier like your skin and it protects you from most pathogens entering your body and the sweat and oil on your skin prevent some pathogens from growing on your body. the second line of defence is when a pathogen makes it past the first line of defence your body can mount an immune response to the attack and destroy the invader. Whether or not the response succeeds depends very much on your body's ability to distinguish between cells that belong to it and cells that do not.
what first line of defence wiil stop bacteria
cellular defence
The second line of defence is the non specific, it includes antimicrobial proteins, phagocytes and other cells. - In this state to inhibit spread of invader through out the body. -Inflamation, is its hallmark and most important mechanism.
This may or may not be what you had in mind, but the first line of defense is the skin, which keeps out pathogenic organisms. Then there is the immune system.
Its a defence mechanism.
yeah....memory cells are a part of our body's third line of defence............natural killer cells that is wbc only are not a part of our body's third line of defence.
The body has three main lines of defense against pathogens. They are as follows:First line of defense: Skin, Mucous membranes, and Secretions of skin and mucous membranesSecond line of defense: Phagocytic white blood cells, Antimicrobial proteins, and the Inflammatory responseThird line of defense: Lymphocytes, and Antibodies