Lymphatic System Flashcards
(24 cards)
Secretes hormone that cause T-lymphocytes to mature
Thymus
Location of RBC production in fetus
Spleen
Initiates immune response to circulating antigens
Spleen
Where macrophages remove abnormal and old RBC’s
Spleen
Lymphoid organ that stores platelets and iron
Spleen
Filter debris, pathogens, and other antigens from circulating lymph
Lymph Nodes
Lymphoid organ that removes many pathogens entering the body in food or inhaled air
Tonsils
Allows for proliferation of lymphocytes and a surveillance point
Lymphoid Tissue
Lymphoid tissue makes up all lymphoid organs except…
The thymus
Keep lymph flowing in one direction
Valves
Circulation of lymph is caused by… (4)
Milking by skeletal muscles
Pressure changes in thorax caused by breathing
Pulsating neighboring arteries
Contraction of smooth muscles in lining of large lymphatic vessels
4 Lymphoid Organs
Thymus
Spleen
Lymph Nodes
Tonsils
Encapsulated structures consisting largely of lymphocytes
Lymphoid organs
Where lymphatic ducts empty
Junction of internal jugular and subclavian veins
Receives lymph from rest of the body (besides R arm, R side of head & thorax)
Thoracic duct
Drains R arm, R side of head and thorax
Right Lymphatic Duct
Union of largest lymph collecting vessels
Lymphatic Trunk
Lymph collecting vessels are similar to veins except…
Thinner walled
More valves
Lymph capillaries are absent from…
Bones
Teeth
CNS
Smallest lymphatic vessels
Lymphatic Capillaries
Lymphatic vessels return lymph away or towards the heart?
Toward
One way system that returns lymph toward the heart
Lymphatic Vessels
Lymph is similar to blood plasma, but with…
Less protein
More fat
Fluid entering lymphatic vessels from the interstitial fluid
Lymph
