L22

Question 1

Describe the term lymph

Answer 1

Lymph:
A coagulable fluid
Similar to plasma 
Contains WBC + lipids(chyle)
Only used once interstitial fluid enters the lymphatic vessels

Question 2

What is the general role of the lymphatic system?

Answer 2

Drains fluid from tissue spaces preventing oedema

Absorbs/transport of FA from SI.

Body’s defence mechanism

Question 3

Difference between lymphatic capillaries and lacteals?

Answer 3

Lymphatic capillaries and lacteals are the same, however, lacteals are found in the SI and carry lipids aswell as lymph AKA chyle.

Question 4

What do lymphatic capillaries join to form? talk about the structure of this

Answer 4

Lymphatic afferent vessels:
Transport lymph towards lymphatic nodes
Contain veins for backflow
3 layers walls, tunica adventitia (connective tissue), tunica media (smooth muscle), Endothelium (single cell layer).

Question 5

How does lymph move from tissue spaces and within the lymphatic system itself?

Answer 5

Filtration pressures in tissue spaces
Contraction of neighbouring skeletal muscle
Respiratory movements
Contraction of lymphatic vessels

Question 6

Where do the upper lymph nodes drain to?

Answer 6

Subclavian trunk

Question 7

What percentage of drainage from the breast goes to axillary and how much to parasternal?

Answer 7

axillary: 75%
Parasternal: 25%

Question 8

What area does the right lymphatic duct and left lymphatic duct drain?

Answer 8

Right lymphatic duct drains the top quarter right of the body.
The left lymphatic duct drains the remaining 3/4 of the body.

Question 9

Where is the spleen located?

Answer 9

LEFT HYPOCONDRIUM region of abdomen