Lymphatic System And Body Defenses Flashcards
(30 cards)
Two semi independent parts of lymphatic system
Lymphatic vessels
Lymphatic tissues and organs
Functions of lymphatic system
Transports escpaed fluids back to the bloodstream
Plays essential role in body defense and resistance to diseases
Is an excess tissue fluid carried by the lymphatic vessels
Lymph
What are the properties of lymphatic vessels?
One way system toward the heart
No pump
Lymphy moves toward the heart
Carries lymph towards the heart
Lymphatic vessels
Small lymphatic vessels that absorbs lymph fluids
Lymph capillaries
Collects lymph from lymph capillaries and carries it away from lymph nodes
Lymph Collecting vessels
Two large ducts in the thoracic region
Right lymphatic duct
Thoracic duct
Drains lymph from the right arm and the right side of the head and thorax
Right lymphatic ducts
Receives lymph from the rest of the body
Thoracic duct
What is the function of the two large ducts in the thoracic region?
Empty the lymph into the subclavian vein.
What are the harmful materials that enter lymph vessels
Bacteria
Viruses
Cancer cells
Cell debris
Filters the lymph that goes through the lymphatic vessels to the heart
Lymph nodes
What are the cells of lymph nodes
Macrophages
Lymphocytes
A cell within the lymph node that engulfs and destroy any foreign substances.
Macrophages
It is a type of white blood cell in the lymph nodes that provides immune response to antigens
Lymphocytes
Surrounding the lymph node
Fibrous capsule
Extend inward to divide the lymph nodes into a number of compartments.
Trabeculae
Outer part of the lymph node
Cortex
Collection of lymphocytes and it is found on the Cortex of lymph node
Follicles
Inner part of a lymph node that contains phagocytic macrophages
Medulla
The Lymphoid organs
Spleen
Thymus
Tonsils
Payer’s patch
Appendix
It is a Lymphoid organ that filters and cleanses the blood of bacteria, viruses and other cell debris
Spleen
It is a lymphoid organ that destroys worn out red blood cells and return some of its breakdown to the liver
Spleen