Question

defense cells in blood are called white blood cells or
thrombocytes.
erythrocytes.
immunocytes.
lymphocytes.
leukocytes.

Explanation:

To solve this, we analyze each option:

• Thrombocytes are platelets (involved in clotting, not defense).
• Erythrocytes are red blood cells (carry oxygen, not defense).
• Immunocytes is a broader term, but white blood cells are specifically called leukocytes.
• Lymphocytes are a type of white blood cell, but the general term for white blood cells (defense cells) is leukocytes.
• Leukocytes is the scientific name for white blood cells, which are defense cells in blood.

Answer:

E. leukocytes.