Immune System A well-working immune system prevents germs from entering your body and kills them or limits their harm if they get in. To keep your immune system healthy, get plenty or sleep, stay active, eat healthy foods, manage your weight, reduce your stress and follow other healthful habits.

 

Immune System

A well-working immune system prevents germs from entering your body and kills them or limits their harm if they get in. To keep your immune system healthy, get plenty or sleep, stay active, eat healthy foods, manage your weight, reduce your stress and follow other healthful habits.

What is the immune system?

Your immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.

• your body, including in your neck, armpits, and groin. Swollen, tender lymph nodes are a clue that your body is fighting an infection.
• Spleen: Your spleen stores white blood cells that defend your body from foreign invaders. It also filters your blood, destroying old and damaged red blood cells.
• Tonsils and adenoids: Because they are located in your throat and nasal passage, tonsils and adenoids can trap foreign invaders (for example, bacteria or viruses) as soon as they enter your body. They have immune cells that produce antibodies to protect you from foreign invaders that cause throat and lung infections.
• Thymus: This small organ in your upper chest beneath your breast bone helps mature a certain type of white blood cell. The specific task of this cell is to learn to recognize and remember an invader so that an attack can be quickly mounted the next time this invader is encountered.
• Bone marrow: Stem cells in the spongy center of your bones develop into red blood cells, plasma cells and a variety of white blood cells and other types of immune cells. Your bone marrow makes billions of new blood cells every day and releases them into your bloodstream.
• Skin, mucous membranes and other first-line defenses: Your skin is the first line of defense in preventing and destroying germs before they enter your body. Skin produces oils and secretes other protective immune system cells. Mucous membranes line the respiratory, digestive, urinary and reproductive tracts. These membranes secrete mucus, which lubricates and moistens surfaces. Germs stick to mucus in the respiratory tract and then are moved out of the airways by hair-like structures called cilia. Tiny hairs in your nose catch germs. Enzymes found in sweat, tears, saliva and mucus membranes as well as secretions in the vagina all defend and destroy germs.
• Stomach and bowel: Stomach acid kills many bacteria soon after they enter your body. You also have beneficial (good) bacteria in your intestines that kill harmful bacteria.

immune system to protect you from harmful germs. They include:

Allergies: When the body overreacts to a harmless substance (such as food or pollen), the immune system launches a response. Your body fights its allergy triggers by releasing histamines that cause allergy symptoms. An allergic reaction can range from mild (sneezing or stuffy nose) to severe (breathing problems and even death). Antihistamine medications help calm the symptoms.

Autoimmune disorders: These disorders occur when the immune system mistakenly attacks its own healthy cells. Lupus, diabetes, Hashimoto’s disease and rheumatoid arthritis are examples of common autoimmune diseases.

Primary immunodeficiency disorders: These disorders are inherited (passed along in families). There are more than 100 primary immunodeficiency diseases (PIDD) that prevent the immune system from working as it should.

Infections: HIV and mononucleosis (mono) are well-known infections that weaken the immune system. They lead to serious illness.

Cancer: Certain types of cancer, like leukemia, lymphoma and myeloma affect the immune system directly. These cancers occur when immune cells grow uncontrollably.

Sepsis: Sepsis is an overwhelming response of your body’s immune system to an infection. This triggers widespread inflammation and causes a downward spiral of events that can end in organ damage, organ failure and death.

Medications: Some medications, such as corticosteroids, can weaken the immune system. And after an organ transplant, people take immunosuppressant medications. These medicines help prevent a failed transplant (rejection). However, these drugs increase your risk of infection and disease.

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How can I keep my immune system healthy?

Just like the rest of your body, your immune system needs nourishment, rest, and a healthy environment to stay strong. Certain lifestyle changes can boost your immune system and help you avoid illness. To keep your immune system running smoothly, you should:

Quit smoking.

Lose weight or maintain a healthy body mass.

Eat a healthy diet that includes lots of fruits and vegetables.

Avoid alcohol or use it only in moderation.

Get enough sleep.

Exercise regularly.

Wash your hands often.

Try to stress less and focus on mind/body wellness.

Make sure you’re up-to-date on vaccines