the body’s ability to resist foreign
organisms and toxins that damage tissues and
organs; can be natural or adaptive

Lymphatic capillaries are tiny, closed-ended tubes that
extend into interstitial spaces, paralleling the blood
capillaries

and remove bacteria and cellular debris before
lymph is returned to the blood

resembles a large lymph
node except that it contains blood
instead of lymph

are chemicals that kill many pathogens

resistance present at birth;
not dependent on prior exposure to an
antigen

thinner than
those of veins, but are
constructed with the same
3 layers

Monitor body fluids; performed by
lymphocytes and macrophages

which
contains many lymphocytes

provided by HCl in gastric juice is
lethal to some pathogens

body’s ability to recognize and
remember specific antigens in an immune response

Organs

attack viruses, bacteria and parasitic cells that
enter a lymph node

contains red blood cells,
macrophages, and lymphocytes

hormone-like peptides secreted by lymphocytes
and fibroblasts when viruses or tumor cells are present, block
viral replication and slow the growth of tumors

multiple copies of
cells or genes that kill tumor cells; passive
immunotherapy

flaplike, like veins

engulf and destroy foreign particles, debris,
and damaged cells

A disease-causing agent

a group of proteins in body fluids, stimulates
inflammation, attracts phagocytes and enhances
phagocytosis

contain antigens from the patient’s tumor
cells; stimulate the patient’s own T cells to recognize
and kill the cancerous cells; active immunotherapy

Once inside a lymphatic capillary, tissue fluid is called

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

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

such as pepsin in the stomach and lysozyme in
tears, destroy many pathogens