Group of cells and chemicals that travel in lymphatic vessels, and organs & glands that synthesize them.

Tiny, closed-ended tubes that extend into interstitial spaces, paralleling the blood capillaries.

Drives the entry of fluid into lymphatic capillaries.

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

A disease-causing agent that can be bacteria, viruses, fungi or protozoans.

Vessels that collect and carry away excess fluid from
interstitial spaces, eventually returning it to the blood

Tissue fluid once inside a lymphatic capillary.

A condition that interferes with the flow in lymph and results in an accumulation of lymph in the interstitial spaces.

Hormones secreted by thymus to provide immunity.

A mechanism of defense against pathogens that guards against many types of pathogens and responds quickly.

Special vessels that transport absorbed fats to the
circulation.

Organs that larger lymphatic vessels pass through.

Diffuse, unencapsulated lymphatic tissue associated with the digestive, respiratory, urinary, and reproductive systems.

The body’s largest lymphatic organ which lies in the upper left abdominal cavity.

A mechanism of defense against pathogens that responds against only a specific type of pathogen more slowly.

Start as lymphatic capillaries, that merge to form larger
vessels, that empty into veins in the thoracic cavity.

Created by plasma proteins to draw most fluid back through capillary walls.

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

Pulp containing red blood cells, macrophages, and lymphocytes.

Resistant to diseases that affect other species.

Drains lymph from the lymphatic vessels

The larger of the collecting ducts that drains the rest (majority) of the body, and empties into the left subclavian vein.

engulf and destroy foreign particles, debris,
and damaged cells.

Type of pulp in the spleen that contains many lymphocytes.

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