Human Body Barriers
White Blood Cells
The human body is made up of some 50 billion white blood cells which is one of human body barriers. These are the body’s defenses – they roam the blood and other body fluids looking for germs like bacteria and viruses and kill them. Some search for and destroy the cancer cells that cause cancer.
Defence Force
Our body contains various types of white blood cells, each of which is susceptible to certain types of bacteria. Most are made of bone marrow, a jelly-like tissue found in the empty space inside the bones. White blood cells live for only 3-4 days. When you get sick, the number of white blood cells increases as your body goes up as your body fights the disease.
Big Eaters
Macro phage cells kill & eat bacteria like germs. They also swallow large amounts of debris and dirt from damaged tissues, which helps to clean wounds.
First Defence
Most common type of white cell is Neutrophils. They start at the scene to destroy the invading bacteria when your skin is cut off. They collected a thousand in wounds, creating a yellow substance called pus. Its also a human body barriers to protect from germs & viruses.
Specialist Killers
Instead of attacking any invader, the lymphocyte learns to attack only one type of germs. They kill bacteria in various ways. Some stick to germs and fill with toxins. Some chemicals release antibodies, which attach to bacteria and attract other types of white blood cells.
Fighting Cancer
The natural killing cells of white blood cells protect the body from cancer and germs. When a natural killer cell finds a cancer cell, it burrows holes in its animal and injects the cancer cell killer inside.
Fun Fact!
One drop of blood can contain up to 25,000 white blood cells.
Must Read – Human Body Barriers Part 1