lymphatic system Flashcards
what are the functions of the lymphatic system
- reabsorbs excess interstitial fluid
- transport dietary lipids
- lymphocyte development, and the immune response
what is a lymph ?
tissue fluid (interstitial fluid) that enters the lymphatic vessels
what are the components of the lymphatic system
lymph
lymphatic vessels
lymphatic organs
lymphatic cells
what are your lymphatic vessels
lymphatic capillaries
lymphatic vessels
lymphatic trunks
lymphatic ducts
what are your lymphatic organs ?
thymus
lymph nodes
spleen
tonsils
lymphatic capillaries
tiny thin micro vessels located in spaces btw cells (not CNS) and drains extracellular fluid
lymphatic collecting vessels
like blood vessels but thinner. Lymph is propelled by the movement of skeletal muscles, pulsing of nearby arteries and tunica media (smooth muscle).movement
lymphatic trunks
carries lymph and then emptied into ducts
lymphatic ducts
vessels that empties lymph into one of the subclavian veins. Two ducts- the right lymphatic duct and the thoracic duct
lympahtic capillaries lacteals
located in the small intestine these capillaries are called lacteal
they pick up dietary lipids and lipid-soluble vitamins
The lymph of this area has a milky color due to the lipid and is also called chyle.
drainage pattern
right lymphatic duct
Receives lymph from right half of head, neck, thorax and right upper limb, right lung, right side of heart, right surface of liver
thoracic duct
Thoracic duct
Drains lymph from lower limbs, pelvic cavity, abdominal cavity, left side of thorax, and left side of the head, neck and left upper limb
movement of lymph
changes in pressure gradients and compression of lymphatic vessels help to move lymph towards the thorax and back into central circulation
skeletal muscle contraction
thoracic pressure changes due to breathing
lymphatic cells
macrophages
epithelial cell
dendritic cells
lymphocytes
what is the primary lymphatic organ
red bone marrow
thymus gland
what are the secondary lymphatic organ
lymph nodes
lymph nodules
spleen
lymph nodes
small, round or oval
located along the pathways of lymph vessels,
have an afferent vessel and efferent lymph vessels
act as a filter to remove debris and pathogens from the lymph (liquid)
regional lymph node
is the lymph node where the lymph of the organ or part of the body drainage to firstly
sentinel lymph node
cancer spread
spleen
located on the lest epigastric region
largest lymphatic organ in the body
functions- blood storage
lymphocyte proliferation, blood filtration
thymus
consist of two elongated lobes
is a large organ in the fetus
occupies the thoracic cavity behind the sternum
secretes lymphopoietin
lymphangitis
inflammation of the lymph vessels
commonest cause bacteria called streptococcus pyogenes (most common)
red streaks through the skin
lymphadenopathy
means a disease of the lymph nodes
lymph nodes become swollen/enlarged and may be painful to touch
lymphomas
cancer originating either from the lymphocytes or the lymphatic tx in organs
splenomegaly
enlarged spleen
various causes
