A&P Lymphatic System Chp 20
Lymphatic System consists of 2 semi-independent parts:
1. Lymphatic vessels—network that carries lymph from peripheral tissues to the venous system
2. Lymphatic tissue and organs—found throughout the body
*Lymph system cells—lymphocytes, phagocytes and other immune system cells
What is Lymph?
Fluid derived from plasma/interstitial fluid. Does not have plasma proteins
What does the Lymphatic System do?
Returns interstitial fluid and leaked plasma proteins to the blood stream
It produces, maintains, and distributes lymphocytes
Protects against pathogens
Immune system is all body cells and tissues involved in immunity (includes integumentary, digestive, cardio, respiratory, etc)
Circulation: lymphatic capLymph collecting vessles (w/valves)Lymph nodeLymph trunkLymph duct heart
Lymph vessels are a ONE WAY system that carry lymph towards the heart.
How do Lymp caps vary from blood caps?
Lymph: start as dead ended pockets, have larger diameters, thinner walls, flat or irregular in section. They have endothelial tissue. Filaments are anchored to connective tissue.
During inflammation, lymph caps can absorb:
Cell debris
Pathogens
Cancer cells
Cells in the lymph nodes cleanse and examine debris
Lacteal are special lymphatic capillaries in the small intestine that transport lipids from the digestive tract.
Where do you find superficial lymphatic vessels?
Skin
Mucous membranes
Serous membranes lining body cavities
Deep lymph vessels are larger and accompany deep artieries and viens
Both the superficial and deep lymphatic vessels join to form lymphatic trunks which empty into 2 main collecting vessels:
Thoracic duct—collects form rest of body and empties into L Subclavian vein
Right lymphatic duct—collects from right upper arm, right side of head and thorax. Empties into R Subclavian vein
Lymph Transport
Lymphatic system lacks a pumping organ, rather the lymph vessels are low pressure conduits and use same methods as veins to propel
1. Lymphatic vessels—network that carries lymph from peripheral tissues to the venous system
2. Lymphatic tissue and organs—found throughout the body
*Lymph system cells—lymphocytes, phagocytes and other immune system cells
What is Lymph?
Fluid derived from plasma/interstitial fluid. Does not have plasma proteins
What does the Lymphatic System do?
Returns interstitial fluid and leaked plasma proteins to the blood stream
It produces, maintains, and distributes lymphocytes
Protects against pathogens
Immune system is all body cells and tissues involved in immunity (includes integumentary, digestive, cardio, respiratory, etc)
Circulation: lymphatic capLymph collecting vessles (w/valves)Lymph nodeLymph trunkLymph duct heart
Lymph vessels are a ONE WAY system that carry lymph towards the heart.
How do Lymp caps vary from blood caps?
Lymph: start as dead ended pockets, have larger diameters, thinner walls, flat or irregular in section. They have endothelial tissue. Filaments are anchored to connective tissue.
During inflammation, lymph caps can absorb:
Cell debris
Pathogens
Cancer cells
Cells in the lymph nodes cleanse and examine debris
Lacteal are special lymphatic capillaries in the small intestine that transport lipids from the digestive tract.
Where do you find superficial lymphatic vessels?
Skin
Mucous membranes
Serous membranes lining body cavities
Deep lymph vessels are larger and accompany deep artieries and viens
Both the superficial and deep lymphatic vessels join to form lymphatic trunks which empty into 2 main collecting vessels:
Thoracic duct—collects form rest of body and empties into L Subclavian vein
Right lymphatic duct—collects from right upper arm, right side of head and thorax. Empties into R Subclavian vein
Lymph Transport
Lymphatic system lacks a pumping organ, rather the lymph vessels are low pressure conduits and use same methods as veins to propel