lymphatic system Flashcards
(11 cards)
1
Q
3 functions of the lymphatic system
A
- excess fluid
- fat absorption
- helps fight disease
2
Q
what is excess fluid?
A
- fluid tends to leak out at the aerial end of the blood capillary due to high pressure and it returned through the lymphatic system
2
Q
what is the fluid returned to the blood known as?
A
lymph
2
Q
how does lymph enter the bloodstream again
A
subclavian vein
3
Q
how does the lymphatic system help fight disease
A
- lymph entering the lymph nodes contain cell debris, foreign particles and micro organisms .
- inside the nodes are leukocytes and macrophages that work together to get rid of the foreign particles through phagocytosis
4
Q
what is lymph?
A
- a clear yellow liquid that comes from between cells
5
Q
how is lymph returned to the circulatory system?
A
blind lymph capillary > lymph vessel > lymph node > lymph vessel > lymph duct > subclavian vein > returns to blood
6
Q
how is lymph moved around
A
it is pushed through by your skeletal muscles
they contract to push through and back flow is prevented by valves
6
Q
lymph vessels
A
one way of carrying fluids away from the tissues
6
Q
lymph capillaries
A
larger and more permeable than blood capillaries
6
Q
lymph nodes
A
occur at intervals on the vessels
- between 1-25mm
