Microbiology
Improve your experience by picking them
Which of the following options correctly includes only components of the first line of defense?
Skin, cilia, saliva enzymes, gastric acid, sweat glands, and hair follicles
Macrophages, mast cells, natural killer cells, and complement system
Antibodies and memory cells, and specific immune responses
Skin, cilia, saliva enzymes, macrophages, mast cells, and natural killer cells