Lymphatic System

Question 1

What is the main important function of the lymphatic system?

Answer 1

Helps to protect our bodies from infections and fight disease - invollved in immune response

Question 2

How do fluids and substance move through lymphatic system?

Answer 2

• No pump for lymphatic system (unlike cardiovascular system)
• There are valves in lymph vessels that prevent bakflow
• Fluid is moved through action of breathing, muscular contraction and presence of adjacent vessels

Question 3

Where are lymph nodes located?

Answer 3

Located:
* On neck
* Under our armpits
* Groins
* Abdomen

Question 4

What is the importance of lymph nodes being located here?

Answer 4

They help protect vital organs from being infected by intercepting pathogens beforehand. Thus they are strategically placed between connection of limbs and head.

Question 5

What is the primary lymphoid organ?

Answer 5

Bone Marrow and thymus gland

Question 6

What is function of bone marrow?

Answer 6

Where all blood cells are made (including white blood cells)

Question 7

What is function of Thymus gland?

Answer 7

T-cells and NK cells mature here

Question 8

What is the secondary lymphoid organ?

Answer 8

Lymph nodes and spleen

Question 9

What happens to B and T lymphocytes in lymph nodes?

Answer 9

B-lymphocytes and T-lymphocytes are activated

Question 10

What is the purpose/benefit of lymph nodes?

Answer 10

• Having lots of B+T cells concentrated in lymph nodes increases the chance of interactions between all cell types of the adaptive immune system (3rd line)
• This speeds up response

Question 11

What is special about Dendritic cells?

Answer 11

Dendretic cells are the phagocytes which present antigen in lymph nodes