Ground nesting bees in your backyard! Ground nesting bees in your backyard! Not all bees live in hives like honey bees do. In fact, 70% of all the 20,000 species of bees nest under ground. In North America, most of these ground bees become active in early spring.
Monocytes share the vacuum cleaner (phagocytosis) function of neutrophils, but are much longer lived as they have an additional role: they present pieces of pathogens to T cells so that the pathogens may be recognized again and killed, or so that an antibody response may be mounted.
Once distributed through the blood stream, monocytes enter other tissues of the body such as the liver (Kupffer cells), lungs (alveolar macrophages), skin (Langerhans cells), and central nervous system (microglia) (Gordon 2003).