substance that is recognized by surface antibodies or other immune cells to prompt an immune response
lymphocyte that originates and matures in the red bone marrow and produces antibodies, which bond to pathogens and neutralize them
leukocyte (white blood cell) from the myeloid lineage that releases histamine and heparin to promote inflammation
movement of leukocytes through capillary walls from the bloodstream into tissue as part of the inflammatory response
leukocyte (white blood cell) from the myeloid lineage that contains granules, releases cytotoxic chemicals to kill large parasites, and plays a role in allergies and asthma
systemic response to pathogens that inhibits bacterial growth and aids in the overall immune response by increasing leukocyte mobility and T cell proliferation
local response to injured tissue that results in an increased blood flow to the affected site and triggers a cell-mediated immune response if the second line of defense fails
nonspecific, immune response, including chemical and physical barriers and internal cellular and chemical defenses
cytokine released from cells infected by a virus that causes a series of protective changes in neighboring cells
specialized immune cell that originates from hematopoietic stem cells found in the red bone marrow
specific type of leukocyte that includes several different types of specialized immune cells, all of which are primarily found in lymph (interstitial fluid that has entered the lymphatic system)
immune cell that lives for a long time in the body's tissues and releases chemicals, triggering allergic-mediated responses from the immune system
large phagocytic leukocyte (white blood cell) that circulates in the bloodstream. When attracted to tissues, it differentiates into a macrophage.
most common type of leukocyte (white blood cell) in the body. It migrates from the bloodstream to carry out phagocytosis at the site of an injury.
process by which cells such as macrophages engulf and digest pathogens or other material
leukocyte produced by red bone marrow that migrates to the thymus gland, where it matures. They play a role in eliciting the adaptive immune response