The general ways that we prevent foreign materials from causing harm to us

Eliminate the initial cause of cell injury, clear out necrotic cells and tissues damaged from the original insult and the inflammatory process

Protects against some parasite genotypes but not others

Make antibodies to help antigens, to perform the role of antigen-presenting cells

Protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch, heat, and cold.

Detects harmful substances, called antigens

Filters foreign particles from entering the nasal cavity and collecting moisture.

Plays a central role in cell-mediated immunity

Helps shield your lungs from dust, bacteria, exhaust fumes, cigarette smoke, viruses, and other intruders.

Help the activity of other immune cells by releasing T cell cytokines