Protection Cells

Questions and Answers

To produce hormones that regulate growth

To carry oxygen throughout the body

To patrol the bloodstream and attack pathogens (correct)

To digest food in the stomach

In the lungs

In the bones (correct)

In the brain

In the liver

Bacteria

Leukocytes

Pathogens (correct)

Antibodies

Neutrophils Signup and view all the answers

Between 7,000 and 25,000 Signup and view all the answers

Immune system Signup and view all the answers

They attack and try to eliminate them Signup and view all the answers

Leukocytes Signup and view all the answers

It increases to fight the infection Signup and view all the answers

Bacteria and fungi Signup and view all the answers

Study Notes

The immune system has special cells called white blood cells that patrol the bloodstream to detect and fight against harmful threats like bacteria, infection, or other pathogens.
White blood cells are like the police, protecting the body from harm, and are connected to the immune system.

White blood cells are made inside the bones and circulate through the bloodstream in search of pathogens.
There are between 7,000 and 25,000 white blood cells in one drop of blood, and more can be produced if the body is fighting a serious infection.
White blood cells are also called leukocytes.

The immune system is the body's defense against harmful pathogens that can cause illness.
White blood cells are an essential part of the immune system, with five different types, each with a unique job:
- Some fight bacteria
- Others fight allergies
- Others battle parasites
The most common type, neutrophils, fights pathogens like bacteria and fungi.

Neutrophils are the most important type of white blood cell.
When they detect pathogens in the blood, they spring into action and ingest them, much like a vacuum cleaner.
Neutrophils look like a bumpy snowball, with a white and bumpy exterior, a nucleus (control center) on the inside, and tiny granules that help digest pathogens.
The clear liquid inside the cell is called cytoplasm.