White Blood Cells
Biology: Cambridge International GCSE Supplement, topic 9.4.3
White Bloods Cells
White blood cells defend against infections. There are two types of white blood cells; phagocytes and lymphocytes.
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.
Phagocytes
- Phagocytes engulf harmful microorganisms in a process known as phagocytosis.
Lymphocytes
- Lymphocytes produce proteins called antibodies, which are part of the body's immune response.
Test yourself on White Blood Cells
What is the role of white blood cells?
Why can white blood cells change shape?