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axillary lymph nodes Lymph nodes that are located in the axillary, or armpit, area.axillary lymph nodes, dissection Lymph nodes found in the underarm region (axilla).axon A long, slender projection from a nerve cell, or neuron, which conducts electrical impulses away from the cell.
Bioluminescent imaging uses natural chemicals such as luciferase, the substance that enables fireflies to glow, to trace the movement of certain cells or to identify the location of specific chemical reactions within the body.Antigens can be substances like bacteria, viruses, or even pollen that invade the body.arrhythmia Arrhythmias are also called heart rhythm problems. Arrhythmias occur when the heart that beats too fast (called tachycardia), too slow (called bradycardia), or irregularly.The body fights off infection by producing antibodies, which destroy or neutralize bacteria, viruses, or other harmful toxins.
antigen Any foreign substance, such as a protein, toxin or other particle that stimulates the body’s immune system to produce antibodies.atherosclerosis A disease in which fatty deposits consisting of fat, cholesterol and other substances collect along the walls of arteries.
