The Lymphatic System (chpt. 27)

Question 1

What is the lymphatic system?

Answer 1

A one way system of lymph vessels containing a fluid called lymph

Question 2

What is the function of the lymphatic system?

Answer 2

Return tissue fluid from around cells to the blood

Question 3

Tissue fluid

Answer 3

Plasma without RBC or platelets
(Becomes lymph fluid once in lymph vessels)

Question 4

How is tissue fluid returned to plasma

Answer 4

• through blood capillaries
• through dead-ending lymph vessels

Question 5

Lymph

Answer 5

Made of tissue fluid with lymphocytes, protein and lipids

No RBC

Question 6

How does lymph move through lymph vessels

Answer 6

Using muscles, valves ensure correct movement

Question 7

How is lymph returned to the blood

Answer 7

Through the subclavian vein

Question 8

Lymph nodes

Answer 8

Swellings found along lymph vessels, especially in groin and armpits

Question 9

Function of lymph nodes

Answer 9

• store lymphocytes (WBC) which produce antibodies and kill microorganisms
• filter bacteria

Question 10

Functions of the lymphatic system

Answer 10

• DRAINAGE - collect excess tissue fluid and return it to blood
• DEFENCE - contains lymphocytes which help fight infection
• TRANSPORT - transport fat

Question 11

Oedema

Answer 11

The swelling of the body due to too much tissue fluid

Question 12

Two ways lymph differs from blood

Answer 12

• no RBC
• no platelets
• no mitochondria
• no clotting proteins

Question 13

In what way do lymph vessels and veins have a similar structure?

Answer 13

Thin walls - blood not under high pressure in vein, allows for easy diffusion of tissue fluid into lymph vessels

Valves - prevent backflow of liquid in both