Physically blocks pathogens from entering the body
BACTERIA
Enters the circulatory system at the junction of the left internal jugular and the subclavian veins.
VIRUS
PHYSICAL BARRIER
FUNGI
MUCUS
Short, hairlike projection, similar to flagellum, that allows some cells to move
CILIUM
CHEMICAL BARRIER
LYMPHATIC CAPILLARIES
PROTOZOA
Joins the venous system at the junction of the right internal jugular and the subclavian veins
A living organism that protects the body.
RIGHT LYMPHATIC DUCT
THORACIC DUCT
LYMPH
Slimy substance that traps pathogens, particles, and debris
Colorless fluid from the body's tissues that carries white blood cells and transports bacteria to the lymph nodes
Vessels that extend into spaces between body tissues and blood vessels.
Destroys pathogens on the outer body surface
MECHANICAL BARRIER
