lymphatic system

Question 1

main function

Answer 1

collect some fluid that escaped from blood and return in to the circulatory system
important role in body’s internal defence against disease causing micro-organisms

Question 2

structure

Answer 2

consists of:
- network of lymph capillaries joined to larger lymph vessels
- lymph nodes, located along lymph vessels

Question 3

lymph vessels

Answer 3

blind-ended tubes that collect fluid, proteins and pathogens between the cells
- fluid called lymph moves through the lymph vessels due to constriction of muscles and eventually get returned to blood

Question 4

lymph nodes

Answer 4

occur at intervals along Lymph vessels
each is surrounded by capsule of connective tissue that extends into a node
lymph enters vessels though the node and it passes through several nodes before entering circulatory system

Question 5

role of lymphatic system against disease

Answer 5

lymph entering nodes contains cell debris, forewign particles and microorganisms that have penetrated body external defenceless - must be destroyed \