Final answer:
Neutrophils are the most numerous WBCs with multilobed nuclei and are known for being phagocytic. They are the first responders during inflammation and play a vital role in fighting bacterial infections.
Step-by-step explanation:
The most numerous white blood cells (WBCs) having multilobed nuclei, being the first to arrive during inflammation, and known for being very phagocytic are Neutrophils.
Neutrophils are a type of granulocyte and are typically the first responders during infection and inflammation. They possess a distinctive multilobed nucleus and are equipped with granules in their cytoplasm that help them fight infections. Notably, neutrophils are integral to the immune system because they are the primary cells that engage pathogens through phagocytosis, a process where they engulf and digest foreign invaders.
Different types of leukocytes, including granulocytes like eosinophils and basophils, as well as agranulocytes such as lymphocytes and monocytes, play various roles in the immune response. However, neutrophils are specifically known for their abundance in the bloodstream and their crucial role in combating bacterial infections.