The Immune System

Place a check next to each of your body's first defenses against pathogens:

• White blood cells

• Red blood cells

• Skin

• Mucus

• Stomach acid

Your immune system uses white blood cells to fight pathogens. Another term for white blood cell is

• Hematocyte

• Neuron

• Leukocyte

• Osteocyte

Phagocytes

• Produce antibodies

• Consume the pathogen

• Help find pathogens

• Produce Antigens

B cells are leukocytes that destroy pathogens by producing proteins called:

• Antibodies

• Antigens

• Mucus

• Antibiotics

How is a fever helpful?

• High temperatures prevent pathogens from reproducing as quickly

• High temperatures help cells make more antibodies

• High temperatures cause the body to make more white blood cells