lymphatic system

Question 1

function

Answer 1

fluid balance
fat absorption
immunological defence

returns tissue fluid back to circulatory system

Question 2

major organs

Answer 2

spleen
thymus gland
Lymphatic vessels
lymph nodes

Question 3

lymph and fluid balance

Answer 3

at the atrial end of the bloojcapillary, fluid tends to leak because of high pressure, some fluid returns at the venous end of capillary, the rest of the fluid now in tissues is returned as lymph.
clear watery liquid formed from interstitial fluid (between cells). help destroy dangerous bacteria
90% of this fluid goes back into the blood capillaries and the rest enters the lymphatic vessel (interstitial fluid in a lymphatic vessel is called lymph)
the lymph capillaries lined with overlapping epithelial cells that allow fluid to enter. Capillaries open to large vessels, often with valves to prevent back flow

Question 4

lymph nodes

Answer 4

where lymph vessels carry lymph to
surrounded by capsule of connective tissue
trabeculae made of reticular fibres from the lymph node structure.
in side germinal centres: rapid mites occurs where lymphocytes and macrophages are produced to fight off invaders in lymph.

Question 5

what happens when large quantities of microorganism overwhelm the lymph nodes

Answer 5

feels swollen

Question 6

what happens after lymph is filtered by lymph nodes

Answer 6

sent through the efferent vessel and sent through the right lymphatic or thoracic duct where merges with the veins and the fluid reenters the circulatory system

Question 7

how does fluid move through the lymphatic system

Answer 7

relies on muscles squeezing against the vessels to pump fluid

Question 8

Lymphocytes

Answer 8

small WBC that work on bacterial and viral infections

two types

Question 9

macrophage

Answer 9

WBC that engulf pathogens and cleans body of wastes

Question 10

neutrophil

Answer 10

move around and seek foreign materials that don’t belong in the body