Lymphatic system

Question 1

Lymphatic system function (1)

Answer 1

A system of vessels and nodes that returns excess fluid tissue to the blood

Question 2

Lymphatic system function (2)

Answer 2

Needed because plasma tends to leak out of blood capillaries

Question 3

Lymphatic system function (3)

Answer 3

Most types of cells get their own oxygen and nutrients directly from interstitial fluid

Question 4

Lymphatic system function (4)

Answer 4

Filter pathogens to be targeted by immune system

Question 5

What is the pathway of flow in the lymphatic system?

Answer 5

Tissue fluid enters lymphatic capillaries, now it is lymph, moves throughout lymph vessels and nodes, returns to blood at veins at base of neck

Question 6

Lymphatic system structure (1)

Answer 6

Very low pressure system, uses valves to maintain flow direction

Question 7

Lymphatic system structure (2)

Answer 7

Lymphatic capillaries create a loose wall and have mini valves which are formed by loose edges of cells = form trap door

Question 8

Lymphatic system structure (3)

Answer 8

Larger lymph vessels which have valves like veins

Question 9

Lymphatic system structure (4)

Answer 9

Lymph nodes contain reticular CT, lymph flows thru nodes, immune cells collect pathogens on the way

Question 10

Lymphedema

Answer 10

Accumulation of interstitial fluid due to poor lymphatic drainage

Question 11

What is an example of lymphedema?

Answer 11

(extreme) Elephantiasis which is caused by a parasitic worm