A trip through the human body – VI

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Continued from…
Part I – Circulatory system
Part II – Respiratory system
Part III – Urinary system
Part IV – Digestive system
Part V – Nervous system

Exploring the Human Body – The Immune System

Your immune system is a complicated network of specialized cells, organs, and tissues that communicate with each other and work together to recognize and attack foreign invaders.

These invaders could be germs such as viruses, bacteria, or fungi. When an invader gets into your body, your immune system uses your lymphatic system and your circulatory system to bring specialized white blood cells to the site of the invasion (one white blood cell is shown at left amid red blood cells).

Your immune system then produces antibodies or special chemicals that attach to the invader to inactivate or destroy it. Some parts of the immune system include the thymus, which produces T cells that protect the body from infection; the spleen, which filters the blood and clears it of bacteria and viruses; and bone marrow, which produces new red and white blood cells.

Immune System Conditions

Problems can occur when your immune system is underactive or overactive. Some children are born with underactive immune systems, which can lead to life threatening infections.

An infection with HIV, the virus that causes AIDS, can also result in not having enough immunity. Examples of an overactive immune system include allergic reactions and autoimmune diseases.

An autoimmune disease occurs when your immune system mistakes normal body tissues for foreign invaders. Some common autoimmune diseases include rheumatoid arthritis, Hashimoto’s disease, diabetes (left, a diabetes patient checks her blood sugar), lupus, psoriasis, and multiple sclerosis.

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Vidya Sury
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After more than a decade in the corporate corporate work, I retired from my corporate career at 33 to focus on family. A change in priorities, and a passion for writing inspired me to start working from home and I am now living my dream as a writer and editor. I write content for clients, blog for businesses and edit manuscripts for publishers/authors. With six blogs of my own and published contributions across the web (The Huffington Post, PTPA, World of Moms, SheKnows), I write to collect smiles and donate to charities. I share stories about all the things I enjoy in life; parenting, mindful living, conversations, coffee, books, food, music, health, DIY, travel, photography and showing my diabetes who’s boss.

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