Innate Immunity- This is the immunity we have at birth. It is rather broad. Phagocytes, basophils, innate lymphoid cells, eosinophils, natural killer cells, dendritic cells, mast cells are some cells that participate in innate immunity. Their response is quick! You could think of this type of immunity as being young & scared, so it's quick to act.

Adaptive Immunity- This is the immunity you develop due to exposure to specific pathogens. It includes B-cells, which work to produce antibodies, and T-cells, which work to attack antigens. Adaptive immunity responses are slow. To remember this, you could think of this type of immunity as an old, slow, and wise person.

Cite:

Week 7 Lab

Bidle, T. S., McKinley, M. P., & O'Loughlin, V. D. (2021). Anatomy & Physiology: An Integrative Approach. McGraw-Hill LLC. 

• "First line of defense - the skin and mucous membranes are physical and chemical barriers that prevent a pathogen from remaining viable and entering the body.

• Second line of defense - innate immune cells, antimicrobial chemicals, and physiological responses against a pathogen that has gained entry into the body.

• Third line of defense - B-lymphocytes (B-cells) and T-lymphocytes (T-cells) assist innate immune cells by providing strong defenses against a specific pathogen."

Cite:

Anatomy and Physiology Week 7 Lab

"The 1976 film, "The Boy in the Plastic Bubble," depicts a person with a deficient immune system, who must live out his life in a completely sterile environment because his body is unable to fight infections. Though the story is fictional, the immune system disease — severe combined immunodeficiency (SCID), or "bubble boy disease" — is very real, occurring in about 1 in every 100,000 births." (Castro, 2013)