ANATOMY

Detailed explanation-1: -The second line of defence is a group of cells, tissues and organs that work together to protect the body. This is the immune system.

Detailed explanation-2: -These include neutrophils (PMNs), eosinophils, and basophils. Neutrophils are the leukocytes found in the largest numbers in the bloodstream and they primarily fight bacterial infections. Eosinophils target parasitic infections. Eosinophils and basophils are involved in allergic reactions.

Detailed explanation-3: -Each of the following is considered a part of the body’s second line of defense except: lysozyme.

Detailed explanation-4: -Skin, tears and mucus are part of the first line of defence in fighting infection. They help to protect us against invading pathogens. You have beneficial bacteria growing on your skin, in your bowel and other places in the body (such as the mouth and the gut) that stop other harmful bacteria from taking over.