A&P MOD 12 - LYMPHATIC SYSTEM

lymphatic system

____ is made up of a diverse system of vessels and organs;

it has a very close relationship to cardiovascular system and digestive system

lymphatic capillaries

the "blind ends" with overlapping cells for one way absorption; main job is to absorb lymph from blood vessels

lymph

watery liquid formed from interstitial fluid and found in lymph vessels

lymphatic vessels / collecting vessels

these are valves that prevent backflow

pumping

skeletal / smooth muscle

breathing

force

lymph

this system has no ___ organ so the ___/____ contraction and ____ provides ___ to move the ___

fluid balance

fat absorption

immune defense

list the functions of the lymphatic system

plasma

talking about fluid balance, high pressure in blood capillaries force some ___ out and most is reabsorbed

interstitial fluid

lymph

the plasma that remains as ____ and is absorbed by the lymphatic capillaries and is called ___

ducts to subclavian veins

lymph is returned back to the blood stream via __ to ___ equaling normal blood volume

3

about ___ of fluid is returned every day

edema

___ is the buildup of excess interstitial fluid to the tissue and results in swelling

extremely low carb diet (high protein / salt)

extensive muscle use

surgery

poor circulation / heart problems

kidney problems

pregnancy

what are the causes of edema

lacteals

chyle

___ is linings of the small intestines and absorbs fats during digestion

liquid is called ___

for energy, cell structure and vitamin absorption

why are fats needed?

MALT (mucosa-associated lymphoid tissue)

- respiratory

- digestive

- urinary

- reproductive

clusters of lymphocytes with no clear boundary; found primarily throughout the tissue that are open to the body (list these systems)

tonsils

MALT structures that are clumps of "lymph nodules" (no capsule, like nodes) and main function is to trap pathogens in nasal/mouth cavity

peyers patches

clumps of "lymph nodules" in lower digestive tract and have strategic location to prevent overproduction of gut bateria

lymph nodes

___ stores / produces certain white blood cells (macrophages & lymphocytes) and filters lymph of pathogens; helps return clean lymph to blood

many

only 1

how many afferent vessels (lymph enters the lymph node)

& how many efferent vessels (lymph leaves the lymph node)

throughout the body, but largest collections in neck, armpits and groin; none in bones, brain or tissues lacking blood

where is lymph nodes located

filtering stations

lymph nodes have many ____ ___ along path towards the heart

marcophages

engulfs bacteria, viruses, etc...

lymphocytes

(B&T cells) produce antibodies; engulf cancer cells and viruses

spleen

largest lymphatic organ

to filter blood and to act as a blood reservoir

what is the spleens major functions

white pulp

contains white blood cells to filter pathogens

red pulp

breaks down and removes worn out white blood cells

blood reservior

___ is a backup in the spleen in case of hemorrhage (blood loss)

ducts to subclavian veins