The Lymphatic System (LC 2026) (Leaving Cert Biology): Flashcards
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13 cards from this deck
Two circulatory systems in mammals
Two circulatory systems in mammals
Blood circulatory system & lymphatic system
What is lymph?
What is lymph?
Clear fluid from tissues with WBCs, fats, & waste
What are lymph vessels?
What are lymph vessels?
Thin tubes carrying lymph back to bloodstream
Function of lymph nodes
Function of lymph nodes
Filter lymph & produce lymphocytes to fight infection
Does lymphatic system have a pump?
Does lymphatic system have a pump?
No
How does lymph move?
How does lymph move?
Valves (stop backflow) & muscle contraction/relaxation
Immune defence role of lymphatic system
Immune defence role of lymphatic system
Nodes trap pathogens; lymphocytes make antibodies
What are lacteals?
What are lacteals?
Lymph vessels in small intestine that absorb fats
Fluid balance role of lymphatic system
Fluid balance role of lymphatic system
Collects excess tissue fluid, prevents oedema
What forces fluid out of capillaries?
What forces fluid out of capillaries?
High pressure in arteries
% of tissue fluid returning to blood capillaries
% of tissue fluid returning to blood capillaries
~90%
% of tissue fluid entering lymph vessels
% of tissue fluid entering lymph vessels
~10%
Lymph contains
Lymph contains
White blood cells, proteins, fats