Leukocytes are which type of blood cell?

Leukocytes are which type of blood cell?

• A. Red blood cells
• B. White blood cells
• C. Platelets
• D. Plasma

Answer: (B)

Leukocytes are white blood cells, the cells of the immune system that defend the body against infection. They circulate in the blood, can move into tissues, and carry out tasks such as phagocytosing pathogens, producing antibodies, and coordinating immune responses. This distinguishes them from other blood components: red blood cells carry oxygen thanks to hemoglobin and lack a nucleus in adults, platelets are tiny fragments that help with clotting, and plasma is the liquid part of blood that carries proteins, nutrients, and other components.

Leukocytes are white blood cells, the cells of the immune system that defend the body against infection. They circulate in the blood, can move into tissues, and carry out tasks such as phagocytosing pathogens, producing antibodies, and coordinating immune responses. This distinguishes them from other blood components: red blood cells carry oxygen thanks to hemoglobin and lack a nucleus in adults, platelets are tiny fragments that help with clotting, and plasma is the liquid part of blood that carries proteins, nutrients, and other components.