LYMPHATIC SYSTEM
Lymph-✔✔ Tissue fluid (interstitial fluid) that enters the lymphatic vessels
Essentially a drainage system accessory to venous system
Larger particles that escape into tissue fluid can only be removed via
lymphatic system
Functions of lymphatic system-✔✔ Network that filters antigens from the
interstitial fluid
Primary site of immune response from tissue antigens
Lymphatic drainage in all organs of the body except brain, eyes, marrow
and cartilage
Flaccid thin walled channels → progressive caliber
600 lymph nodes in body
Slow flow, low pressure system returns interstitial fluid to the blood system
Tissue fluid-✔✔ ________ (interstitial fluid) that enters the lymphatic
vessels.
Components of lymphatics-✔✔ Lymph
Lymphatic Vessels
Lymphatic Organs
Lymphatic cells
Lymphatic capillaries-✔✔ Features of structure:
Blind end
Single layer of overlapping endothelial cells
More permeable than that of blood capillary
Absent from avascular structures, brain, spinal cord splenic pulp and bone
marrow
Lymphatic Vessels-✔✔ Three layered wall but thinner than vein
More numerous valves than in vein
Interposed by lymph nodes at intervals
Lymph-✔✔ Tissue fluid (interstitial fluid) that enters the lymphatic vessels
Essentially a drainage system accessory to venous system
Larger particles that escape into tissue fluid can only be removed via
lymphatic system
Functions of lymphatic system-✔✔ Network that filters antigens from the
interstitial fluid
Primary site of immune response from tissue antigens
Lymphatic drainage in all organs of the body except brain, eyes, marrow
and cartilage
Flaccid thin walled channels → progressive caliber
600 lymph nodes in body
Slow flow, low pressure system returns interstitial fluid to the blood system
Tissue fluid-✔✔ ________ (interstitial fluid) that enters the lymphatic
vessels.
Components of lymphatics-✔✔ Lymph
Lymphatic Vessels
Lymphatic Organs
Lymphatic cells
Lymphatic capillaries-✔✔ Features of structure:
Blind end
Single layer of overlapping endothelial cells
More permeable than that of blood capillary
Absent from avascular structures, brain, spinal cord splenic pulp and bone
marrow
Lymphatic Vessels-✔✔ Three layered wall but thinner than vein
More numerous valves than in vein
Interposed by lymph nodes at intervals
