This term is used occasionally and usually refers to blood leukocytes (which are not fixed and organized in solid tissue) in particular mononuclear phagocytes.
The fibroblasts contain organelles that are necessary for the synthesis and excretion of proteins needed to repair the tissue damage.
They are mobile and leave the blood stream to enter connective tissues where they differentiate into macrophages.
Adipocytes are cells that are very efficient at storing energy in the form of triglycerides.
They are also very numerous in the lamina propria of the respiratory and gastrointestinal tracts, where they are involved in immunosurveillance.
The lamina propria is a layer of loose CT lying immediately beneath the epithelium.
Wandering Cells are probably amoeboid when alive but after fixations they are seen to possess a distinct nucleus.
The cell's cytoplasm contains a variety of inclusions and characteristically, a well-marked eosinophile area.
The wandering cells of nudibranchs are excretory taking up effete matter from the hemocoele and discharging it into the lumen of the gut.
Normally, the body contains many different B cells, specialized for a specific invader, but only has low levels of each type circulating.
When an invader manages to break past other defenses, like the skin or digestive tract into the body, then the circulating B cells that target that particular foreigner multiply up and produce more antibody.