Organs And Functions:
Skin: It is resistant to bacteria and viruses, the skin also secretes antibacterial substances.
Bone marrow: Is the tissue found inside most bones. All cells such as red cells, white cells, lymphocytes derived from bone marrow.
Thymus: Directs T cells mature. T cells instruct other cells how to react to viruses or foreign cells.
Spleen: It acts primarily as a blood filter, while others can spend sagre bacteris are eliminated.
Lymph node: Is similar to the spleen, it contains the same specialized cells. However, no filters the blood, but filters the lymph (fluid drained composed of tissues).
Webgraphy:
https://www.boundless.com/microbiology/textbooks/boundless-microbiology-textbook/immunology-11/overview-of-immunity-135/cells-and-organs-of-the-immune-system-694-3503/
http://bodywiki.wikifoundry.com/page/Immune+System+Organs+and+Their+Functions
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0072579/
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