lymphatic system ch 22 anatomy

what is lymph

fluid

what are components of the lymphatic system (4)

lymph, lymphatic vessels,lymphatic tissues, and lymphatic organs

what functions does the lymphatic system have overall

recovers fluid lost

guards pathogens

absorbs lipids from Small Intesnine

is lymph low or high in protein

low

what does lymph supply to the blood stream

lymphocytes

lymph in intestine is called

chyle

lymphatic capillaries have loosely connected

overalapping endothelial cells

why do the endothelial cells in lymphatic capillaries overalap

they act as flaps to ensure one way flow of tissue into the lymphatic capillary

large gaps between cells in lymphatic capillaries allow for

large substances (like proteins, cels)

lymphatic vessels vs veins

similar but lymphatic vessels have thinner walls and closer valves

what is the flow of lymph in lymphatic vessels

lymphatic trunks are named by

location

what are the two collecting ducts for lymphatic vessels/stystem

right lymphatic duct and thoracic duct

right lymphatic duct

convergance of trunks in right thoracic cavity

drains the right side (upper limb, head, thorax)

what vein does the right lymphatic duct drain into

r sublacvian vein

thoracic duct(left) begins at …

cisterna chyli of abdomen

thoracic duct drains into what vein

left subclavian vein

thoracic duct drains what

left everything (upper limb, head, thorax, abdmoen and BOTH legs)

what is flow of lymph aided by?

rhythmic contraction of lymphatic vessels

flow of lymph resembles ____ blood flow

venous blood flow

flow of lymph is ___ pressure and ___ speed

low, low

lymphatic valves are how many way flow toward heart?

one way

what are lymphatic tissues made of

coolections of lymphoctyes in connective tissue & mucuous membranes

what do u call lymphoid tissue that is in the mucous membranes

MALT (mucosa-asosciated lymphatic tissue)

where is MALT mucosa associated lymphatic tissue in

respiratory, digestive, reporductive, and urinary tract passages

lymphatic/lymphoid tissue can be loosely distributed as ______ tissue or densely packed as _______ _______

diffuse lymphatic tissue

lymphatic nodules

example of lymphatic nodules (densly packed tissue)

aggregated lymphoid nodules (peyer patches) of SI

main difference of primary VS secondary lymphatic organs

primary are where lymphocytes become immunocompetent (immature)

but secondary already immunocompentent (mature)

primary lymphatic organs example

red bone marrow and thymus

primary lymphatic organs’ redbone marrow and thymus function as what

what are secondary lymphatic organs example

lymph nodes and spleen

red bone marrow is the site of ____

hematopoiesis

hematopoiesis supplies what

lymphocytes and other blood cells

what are reticular cells

what is the thymus

a bi-lobed organs between sternum/aortic arch

what does thymus house

developing lymphocteyes and secrets hormones

what age does thymus shrink

after 15

how much lobules does thymus have and what do they contain (lobules are within a lobe)

several lobules, each w cortex/medulla which develop t cells

thymus is bigger or smaller in newborn/why

bigger for immunity

lymph nodes shape and length

bean shapes, less than 3 cm

lymph nodes function

cleanse lymph and act as site of T and B cell activation

lymph nodes outer and inner layer names

outer cortex (with germinal centers) and inner medulla

____ afferent vessels to the node and ______ efferent vessel leaving at the ____

SEVERAL afferent vessels to the node and ONE efferent vessel leaving at the HILUM

where are lymph nodes concentrated in

largest lymphatic organ

spleen (lots of blood)

red vs white pulp in the spleen

red is concentrated erythrocytes and white is lymphoctyes/macrophages

what is primary lymphatic organ iclicker

thymus (they produce t cells)

what are tonsils

pattches of lymphatic tissue @pharync entrance

what do tonsils contain sepcifically

lymphatic nodules and tonsillar cyrupts (tonsil stones)

3 main areas of tonsils

pharyngeal, palatine, lingual

lymphedema

swelling (arms legs) bc obstruction of lymphatic flow

mastectomy (breast removal) can risk what?

lymphedema bc the blockage from worms (filariasis) (blocks flow of lymph fluid)