9-1 Defence against disease

What covers almost all parts of your body and is a physical barrier prevent infection from pathogens

Identify the component of the blood that stimulates the blood to clot

• White blood cells

• Platelets

• Red blood cells

• Plasma

What substance traps traps pathogens before they can enter the lungs?

Identify the hair like structures in the image that sweep pathogens and mucus upwards towards the throat

• Villi

• Alveoli

• Capillaries

• Cilia

Identify the cell in the image

• Lymphocyte

• Red blood cell

• Ciliated epithelial cell

• Phagocyte

Identify the cell that releases antibodies

• Red blood cell

• Lymphocyte

• Platelets

• Phagocyte

State the term for molecules on pathogens that cause lymphocytes to release antibodies

State the term for the molecules released by lymphocytes to neutralise toxins

Identify the organ that contains acid that destroys pathogens

• Lungs

• Heart

• Stomach

• Small intestine

Identify the structure in the image

• Antigen

• Antibody

• Villus

• Alveoli