Final answer:
Type III hypersensitivity involves the formation and deposition of immune complexes in tissues and blood vessels, which can cause tissue damage. It does not involve the recruitment of T cells or direct stimulation of mast cells.
Step-by-step explanation:
Type III hypersensitivity, also known as immune complex-mediated hypersensitivity, is characterized by the formation and deposition of immune complexes in tissues and small blood vessels. These immune complexes can cause tissue damage by activating the complement system, which attracts neutrophils to the site. This hypersensitivity reaction does not involve the recruitment of T cells or the direct stimulation of mast cells.