Immune System

Which of the following is NOT a lymphatic organ?

• Thymus

• Lymph nodes

• Pancreas

• Spleen

The innate immune system requires prior exposure to pathogens to work effectively.

• True

• False

B-cells mature in the thymus.

• True

• False

Which cells produce antibodies?

• T-helper cells

• Macrophages

• B-cells

• Red blood cells

What is the fluid between tissues called before it enters lymph capillaries?

• Plasma

• Serum

• Cytoplasm

• Interstitial fluid

What is the function of lymph nodes?

• Store red blood cells

• Digest fats

• Filter harmful substances and produce lymphocytes

• Pump blood

The thymus gland is most active in adulthood.

• True

• False