Answer:White blood cells, also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Explanation:
Organ system
Microscope
Animal
Plant
Nucleus
Mitochondria
Cell membranes
Cell wall
Golgi bodies
Vacuoles
Endoplasmic reticulum
Ribosomes
Lysosomes
Chloroplast