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1) Physical (skin and mucous membranes) and chemical barriers that prevent entry by pathogens,
2) Nonspecific defensive cells (phagocytes, eosinophils,white blood cells, and natural killer cells) and proteins (interferons and complement system), inflammation and fever, and
3) The immune system that has specific targets and memory.(lymphatic system-recognition of foreign cells)
The Human Body's 3 lines of defense
1.) Integumentary System-skin and accessory organs such as hair, nails, sweat glands, and oil glands
2.) Circulatory System-heart,arteries,veins,capillaries, and blood
3.) Lyphatic and Immune Systems-Thymus, bone marrow, spleen, tonsils, lymph nodes, lymph capillaries, lymph vessels, lymphocytes, and lymph
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoSkin, breathing passages, mouth and stomach - barriers providing the first line of defense
White Blood Cells and inflammatory response - Second Line Of Defense
Antibodies - Third line of defense
Wiki User
∙ 14y agoThe first line of defense is non-responsive to the pathogen. it includes your skin, mucus, ear wax, and stomach acid among other things. The second line of defense is the inflammatory response in which white blood cells attack the pathogen, fever can occur. The third line of defense is specific immune response to the disease in the form of T-cells and B-Cells
http://www.amphi.com/~wilson/grube/ch6/62sumpath.pdf
Wiki User
∙ 13y agoOne is skin, and other is immunity, which identifies pathogens and distinguishes one from another.
NEW ANSWER: Skin, White Blood Cells, Antibodies
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