GENERAL HISTOLOGY

Detailed explanation-1: -The innate immune system is the body’s first line of defense against germs entering the body. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the “nonspecific” immune system.

Detailed explanation-2: -The skin, nails and hair form the integumentary system, which stops dirt and pathogens from entering the body. You also have the internal defense systems, which include white blood cells and the antibodies they produce, otherwise known as the immune system.

Detailed explanation-3: -The first line of defense against infection are the surface barriers that prevent the entry of pathogens into the body. The second line of defense are the non-specific phagocytes and other internal mechanisms that comprise innate immunity.