We come in contact with millions of pathogens which can cause diseases or infections every day. However, we seldom catch an infection or get ill. All thanks to our immunity! The immune system fights the pathogens with antibodies and protects us from catching a disease.
It is an always active mechanism that runs continuously in the body to keep us fit and healthy. Our immune system is made up of organs, cells, tissues and some proteins. It not only combats the pathogens entering the body but also gets rid of the dead and malfunctioning cells. The kind of immunity that is present by birth in all individuals is innate immunity.
On the other hand, as we grow up, our body acquires the second kind of immunity that is known as adaptive immunity. Unlike innate immunity, adaptive immunity is not present by birth but is acquired by the body. Hence, it is also known as acquired immunity.
Let us see the major differences between innate and acquired or adaptive immunity in this article. Innate Immunity. Adaptive Immunity. It is a non-specific immunity present by birth in every individual. It is specific and acquired as one grows up. The kind of immunity which is not antigen-specific and works as soon as an antigen enters the body. Once an antigen has been recognized, the adaptive immune system creates an army of immune cells specifically designed to attack that antigen.
Adaptive immunity also includes a "memory" that makes future responses against a specific antigen more efficient. Combination Immunotherapies References. Visit Healio. Your Module Progress. Module 1. Module Content. Thank you for participating in this module.
Click below to download the certificate. Download Certificate of Participation. Anatomic and physiological barriers Skin, Mucous membranes, Temp, pH, chemicals, etc. Lymph nodes, spleen, mucosal associated lymphoid tissue. Composition The innate immune system is composed of physical and chemical barriers, phagocytic leukocytes, dendritic cells, natural killer cells, and plasma proteins.
Adaptive immune system is composed of B cells and T cells. Development Evolutionary, older and is found in both vertebrates and invertebrates. Adaptive immunity system has been developed recently and is found only in the vertebrates. Example White blood cells fighting bacteria, causing redness and swelling, when you have a cut. Why should de innate immune system have no memmory unlike de adaptive immune system? Basically, for memory cells to be formed, we need T-cells.
So I think it is due toghe absence of T cells in the innate system. Does innate produce antibodies? Once activated against a specific type of antigen, the immunity remains throughout the life.
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