Question: Hola Laura! What are leukocytes? Gracias

Laura Garcia Ibanez answered on 10 Mar 2015:

Hola Saras!
Leukocytes are also named white blood cells and constitute the immune system. There are five big groups: neutrophils, eosinophils, basophils, monocytes and lymphocytes, which include T cells, B cells and NK cells. All these cell types fight together against pathogens to keep us healthy. Please let me know if you want me to be more specific. Cheers!