One of the body's lines of defense ( immune system ) involves white blood cells (leukocytes) that travel through the bloodstream and into tissues, searching for and attacking microorganisms and other invaders. (See also Overview of the Immune System .) This defense has 2 parts: Innate immunity Acquired immunity Innate (natural) immunity is so named because it is present at birth and does not have to be learned through exposure to an invader. It thus provides an immediate response to foreign ... Best-in-class lab materials, technologies & services to help you complete your research. Expertise on every level to craft science & technology solutions in life science. 90%+ purity verified by MALS. High bioactivity verified by ELISA/SPR/BLI/FACS. High stability. For binding&blocking assay, immunization, antibody screening, QC release. These two systems work closely together and take on different tasks. The innate immune system is the body's first line of defense against intruders. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the "non-specific" immune system.
