Which statement correctly explains White Blood Cells?
- A. Blood cells that are a key part of the immune system, defending the body against infection ✓
- B. The largest internal organ in the human body, responsible for detoxification and metabolism
- C. Cold-blooded vertebrates such as snakes, lizards, and turtles that are typically covered in scales
- D. The classification of blood based on the ABO system, comprising types A, B, AB, and O
Correct answer
A. Blood cells that are a key part of the immune system, defending the body against infection
Explanation
'White Blood Cells' refers to blood cells that are a key part of the immune system, defending the body against infection.