<prompt> A 34-year-old man presents with a 5-day history of a painful sore on his hand. Physical examination reveals a 0.5-cm abscess on the extensor surface of the left hand that drains a thick, purulent material. Diapedesis of leukocytes into and around this patients infected wound occurs primarily at which of the following anatomic locations?Lymphatic capillariesPostcapillary venulesPrecapillary aeriolesSmall dermal aeries  <response>: One of the earliest responses following tissue injury occurs within the microvasculature at the level of the capillary and postcapillary venule. 