Inmune system

Inmune System

It works to recognize the antigens and get rid of them.

Antibodies. Lymphocites are triggered to make antibodies.

How?

Functions

External defenses (INATE)

1. Skin

2. Mucose Membrane

3. Secretions

4. Hair

Adaptive

Non- specific:

cytokines, denditric cells, cytokenes.

Specific:

B cells, memory T cells, T helper cells.

Parts of the immune system

Lymph nodes, appendix, bone marrow, tonsils and adenoids, thymus, spleen, and peyer´s patch.

Types of cells

Myeloid precursor

(found in the axon of the neuron)

Granulocytes:

- Neutrophils ( fight pathogens)

-Basophils: (fight allergies)

-Eusinophils: parasites.

Mastocytes

Histamine (inflamation)

Monocytes

Macrophages--- fight microorganisms

Lymphoid precursor

(found in the lymphatic system)

B Cells

lymphocytes and plasma cells that produce antibodies

T Cells

Helper cells ( production of T cells and B cells)

Cytotoxic cells ( regulate and recognize antigens)

Supressor cells ( Cancer cure)

NK Cells

Kill infected cancer cells

Diseases:

AIDS

Acquired immune deficiency syndrome (AIDS) occurs when an HIV-positive person's immune system is weakened, specifically when the T cell count drops below 200.