White Blood Cells
Biology: AQA GCSE Higher, topic 2.3.15
White Bloods Cells
White blood cells defend against infections. White blood cells:
Have a nucleus
- Unlike red blood cells, white blood cells have a nucleus.
Can change shape
- White blood cells can change shape.
- This allows them to squeeze through the walls of blood vessels into body tissues and to engulf harmful microorganisms.
Test yourself on White Blood Cells
What is the main function of white blood cells in the body?
Bacteria have infected body tissue outside a blood vessel. Which ability lets a white blood cell leave the blood vessel to reach the bacteria?
A patient has a very low number of white blood cells. What is the patient more likely to experience as a result?
There are different types of white blood cell, and only some of them ingest bacteria. What does this tell us about white blood cells?