Question

what is the main job of the immune system, explain in one paragraph.

Answer 1

Immune system is one the system's of our body. It's function is to provide immunity against infection and toxins. It consists of bone marrow,thymus,spleen, lymph nodes,skin , mucous membrane etc. They are of two types:-

1 Natural immunity - it is the immunity which an individual had inherited from patents and is active throughout life. It is also known as innate immunity.

2.Acquired immunity- it is the immunity acquired by an individual after exposure to a disease or after vaccination,or after getting directly injected by antibodies.It is not present by birth . They are of two types :-

A) Active immunity - the hosts produces antibodies itself after exposure to disease ( called natural active immunity) ,and when the person is vaccinated against a disease( called artificial active immunity). It is a slow process and is active for long time.

B) Passive immunity - in this antibodies are not produced in the host rather it is produced in some other's body and is directly injected to another individual.It's of two types-

Natural - the immunoglobulins IgG and IgA are transferred into mother to baby through placenta and breast milk.

Artificial - the immunoglobulin vaccine which are dire7injected to produce immunity.

These are fast in process but for short period of time.