molecules that can elicit an immune
response

A disease-causing agent

lies in the upper left abdominal cavity

phagocytose foreign substances

influence the maturation of T lymphocytes

the response by the body against specific pathogens, their toxins, or their metabolic products

Presence and multiplication of a pathogen

The spleen resembles a large lymph node except that it contains _____ instead of lymph

produce antibodies; mature in the bone marrow

contain lymphocytes that leave the thymus to provide immunity

when body temperature is re-set to a higher set point by the body, resulting in an elevated body temperature

Guard against many types of pathogens; respond quickly

Spleen is composed of _____, which
contains many lymphocytes,

attack bacteria and foreign cells; originate in the thymus gland

a soft, bi-lobed organ located behind the sternum, above the heart

the engulfment and digestion of pathogens, foreign particles, and debris

Respond against only a specific type of pathogen; respond more slowly

Spleen is composed of _____, which contains red blood cells, macrophages, and lymphocytes

bean-shaped

Surrounds the thymus and extends inside it and
divides it into lobules

a tissue response to injury or infection

prevent the entry of certain pathogens by providing a physical separation of pathogens and internal tissues

body’s largest lymphatic
organ

Monitor body fluids; performed by
lymphocytes and macrophages

some mature into T cells