Lymphatic System Flashcards
Lymphatic system 3 function
- Drain fluid and protein and return to blood
- transport dietary lipids and soluble vitamins (A,D,K,E) into blood
- carry out immune responses against microbes and abnormal cells
What does the lymphatic system consist of (made up off)
Vessels, cells, fluid, organs, tissue,
Lymphatic system includes
- Lymph
- Lymphatic vessels
- Structures and organs containing lymphatic tissue
- red bone marrow
Where does the lymphatic system sit
Btw capillaries and venules
What is lymphatic tissue
A type of connective Tissue with large number of lymphocytes
What is lymph
It is 15% of the fluid that seeps out of the capillaries , Interstitial fluid .It is clear watery fluid
What is lymphatic vessels
It carries the interstitial fluid that contains waste, plasma proteins back to the blood via the subclavian vein, throat ducts and lymphatic duct
How is the fluid pushed around the Lymphatic vessels
Same as blood
Via the skeletal muscle pump and respiratory pump
Lymphatic vessels contain valves but do not form circuits like blood vessels
What is oedema
Swelling in the tissue
What primary organs and structure contain lymphatic tissue
Red bone marrow and thymus gland
What secondary organ and structure contain lymphatic tissue
Spleen, lymph nodes and lymphatic nodules
Pluripotent stem cells?
Found in bone marrow. Stem cells that have jolted development and waiting to be told what to become RBC, WBC or platelet
What sort of combat do T cells carry out and are T cells
T cells are Wbc
They do cell to cell combat
Where do T cells migrate from
They migrate from the bone marrow to the Thymus (hence T cells) where they mature
Lymph nodes?
Concentrate around grain and axillae (armpit) mammary glands
What wbc do lymph nodes contain
Contain T & B cells + macrophages
B&T cells multiply in nodes when there is an infection
What WBC are in the spleen
B, T and macrophages and RBCs
Only blood flows into the spleen not lymph fluid
WBC’s destroy pathogen and damage blood cells in spleen
Lymphatic nodules
They are masses of WBC’s that line the digestive, urinary and reproductive, respiratory tract. Sites where the body is vulnerable to entry from outside world.
Tonsils are lymphatic nodules
4 cardinal signs of inflammation
Redness, heat , swelling and pain
Why are b cells called B cells
As they grown and mature in the bone marrow
What the two types immunity or resistance to disease
Innate (non-specific) immunity &
Adaptive (specific) immunity
What defences are innate immunity
Skin & mucous membranes trying to prevent entry and
WBC’s, inflammation, fever, antimicrobial substances
What defences are adaptive immunity’s
Defence that involves specific recognition of a pathogen
Involves T & B cells
WBC’s recognises foreign material by their surface molecules
Antigens (invaders) molecules that generate an immune response from WBC’s
What are B& T cells together called
Lymphocytes
What do B cells make when stimulated by a antigen
Make antibodies. B cells release guided missiles to the destroy the cells
What is cytotoxic
T cells that kill
B cells respond to antigens circulating around the body
T cells respond to cells whose chemistry has changed or altered
What proteins do T cells release when attached to a pathogen
Perforin- it makes holes in the pathogen
Release a toxin molecule called lymphotoxin that breaks up the cells
dna
Where do B cells stay
In spleen and lymphatic nodules
