What are the 2 main defense systems of the immune system?

The immune system fights germs and foreign substances on the skin, in the tissues of the body and in bodily fluids such as blood. The immune system is made up of two parts: the innate, (general) immune system and the adaptive (specialized) immune system.

What are the 2 ways our bodies develop immunity?

There are two main parts of the immune system: The innate immune system, which you are born with. The adaptive immune system, which you develop when your body is exposed to microbes or chemicals released by microbes.

Which two body systems support the immune system by providing a physical barrier against invading pathogens?

The skin, mucous membranes, and endothelia throughout the body serve as physical barriers that prevent microbes from reaching potential sites of infection. Tight cell junctions in these tissues prevent microbes from passing through.

What is barrier immunity?

Barrier defenses are part of the body’s most basic defense mechanisms. The barrier defenses are not a response to infections, but they are continuously working to protect against a broad range of pathogens.

What is the immune system made up of?

The immune system is made up of special organs, cells and chemicals that fight infection (microbes). The main parts of the immune system are: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow.

What are the types of immunity?

Humans have three types of immunity — innate, adaptive, and passive:

• Innate immunity: Everyone is born with innate (or natural) immunity, a type of general protection.
• Adaptive immunity: Adaptive (or active) immunity develops throughout our lives.

What are the physical barriers of the immune system?

The skin, mucous membranes, and endothelia throughout the body serve as physical barriers that prevent microbes from reaching potential sites of infection.

What are the physical barriers of innate immunity?

Components of innate immunity Physical barriers: They are mechanical barriers to many microbial pathogens. These are of two types: skin and mucous membrane. 2. Physiological barrier: They include acidity of the stomach, presence of lysozyme, sweat, nasal hair etc.

What are physical barriers?

According to the Centers for Disease Control and Prevention (CDC), physical barriers are “structural obstacles in natural or manmade environments that prevent or block mobility (moving around in the environment) or access” for people with disabilities.

What is immunity system in body?

The immune system is a complex network of cells and proteins that defends the body against infection. The immune system keeps a record of every germ (microbe) it has ever defeated so it can recognise and destroy the microbe quickly if it enters the body again.

How does the immune system protect itself against foreign pathogens?

The Immune System has 3 Lines of Defense Against Foreign Pathogens: 1. Physical and Chemical Barriers (Innate Immunity) 2.

Why are the defense responses of the adaptive immune system faster?

If there is new contact with an antigen that is already known, the defense response can then be quicker. This way the defense responses of the adaptive immune system are more efficient and faster than those of the innate defense, if the antigen is already known.

Why is the innate immune system called the first line of Defense?

The innate immune system is the body’s first line of defense against germs entering the body. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the “nonspecific” immune system.

What is the physical barrier that protects us from pathogens?

Physical Barriers The skin has thick layer of dead cells in the epidermis which provides a physical barrier. Periodic shedding of the epidermis removes microbes. The mucous membranes produce mucus that trap microbes. Hair within the nose filters air containing microbes, dust, pollutants