There are 2 main parts of the immune system:The innate immune system. You are born with this.The adaptive immune system. You develop this when your body is exposed to microbes or chemicals released by microbes.
(ih-MYOON SIS-tem) A complex network of cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases. The immune system includes white blood cells and organs and tissues of the lymph system, such as the thymus, spleen, tonsils, lymph nodes, lymph vessels, and bone marrow.
D. Reviewed by Emily Henderson, B.Sc. The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.
Innate immunityInnate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body. These barriers form the first line of defense in the immune response.
Two types of immunity exist — active and passive: Active immunity occurs when our own immune system is responsible for protecting us from a pathogen. Passive immunity occurs when we are protected from a pathogen by immunity gained from someone else.
ImmunityInnate immunity. We are all born with some level of immunity to invaders. ... Adaptive (acquired) immunity. This protect from pathogens develops as we go through life. ... Passive immunity. This type of immunity is “borrowed” from another source, but it does not last indefinitely. ... Immunizations.
These are three lines of defense, the first being outer barriers like skin, the second being non-specific immune cells like macrophages and dendritic cells, and the third line of defense being the specific immune system made of lymphocytes like B- and T-cells, which are activated mostly by dendritic cells, which ...
The cellular immune response consists of three phases: cognitive, activation, and effector.
The innate immune system can be categorized into three defense mechanisms: (1) physical barriers, (2) cellular components, and (3) humoral responses (15). As will be discussed, the functions of these defense mechanisms are highly conserved between fish and mammals.
What is Immunity? Immunity is your body's ability to recognize germs to prevent them from causing illness. The immune system's job is to help identify and eliminate dangerous germs that enter the body before they can cause disease or damage. There are two types of immunity: innate and adaptive.
The main purpose of the innate immune response is to immediately prevent the spread and movement of foreign pathogens throughout the body. The second line of defense against non-self pathogens is called adaptive immune response.
Humoral immunity is an aspect of specific immune responses directed at particular antigens. It takes the form of unique antibodies produced by B lymphocytes that have been specifically selected to neutralize the antigen at hand.