Lymphatics

Question 1

How does the lymphatic system help with colloid pressure?

Answer 1

Entrains proteins back into the vascular system

Question 2

What do lymphatic vessels do?

Answer 2

Transport interstitial fluid back into the blood

Question 3

How does the lymphatic system participate in immune function?

Answer 3

Via lymphocytes

Question 4

What are lymphatic capillaries?

Answer 4

Closed-end tubules that extend into the intercellular spaces

Question 5

What are lymphatic vessels?

Answer 5

Vessels that flow through/past lymph nodes

Question 6

What are the lymphatic collecting ducts?

Answer 6

Lymphatic vessels empty into collecting ducts, which empty into thoracic veins

Question 7

What is the thickness of lymphatic capillaries?

Answer 7

Single layer epithelial cell

Question 8

What enters the lymphatic capillary, and what is it now called?

Answer 8

Interstitial fluid

Lymph

Question 9

How does lymph flow in lymphatic vessels?

Answer 9

Lymphatic vessels have valves
Some intrinsic constriction
Muscle movements massage vessels

Question 10

Intrinsic vessel constriction of lymphatic vessels creates what kind of pressure?

Answer 10

Negative

Question 11

What is the purpose of the negative pressure generated by the lymphatic vessels?

Answer 11

Entrain proteins from the interstitial space

Question 12

Name the 2 lymphatic collecting ducts

Answer 12

The thoracic duct

Right lymphatic duct

Question 13

Which one of the 2 lymphatic collecting ducts is the major one?

Answer 13

The thoracic duct

Question 14

Damage to which lymphatic duct is more significant? Why?

Answer 14

Left

It drains a larger portion of the body

Question 15

Why are right IJs preferred over left IJs?

Answer 15

The lymphatic duct drainage sites empty into the subclavian veins very close to the same place the internal jugulars empty, if damage is done better the right than the left since it drains a larger portion of the body

Question 16

What general area does the thoracic duct receive lymph from?

Answer 16

Lower extremities
Abdomen
Left chest
Left arm
Left head and neck

Question 17

Where does the thoracic duct empty?

Answer 17

Into the left subclavian vein near the left internal jugular

Question 18

Where does the right lymphatic duct receive lymph from?

Answer 18

Right arm
Right chest
Right head and neck

Question 19

Where does the right lymphatic duct drain?

Answer 19

Into the right subclavian near the right internal jugular

Question 20

What are lymph nodes?

Answer 20

Collections of lymphoid tissue

Question 21

What is contained in lymph nodes?

Answer 21

Phagocytes macrophages that purify lymph

Question 22

Where are B and T cells located?

Answer 22

In the lymph nodes

Question 23

Name the principal lymphoid organ

Answer 23

Thymus

Question 24

When is the thymus most active?

Answer 24

During infancy

Question 25

Name 2 other additional lymphoid tissues

Answer 25

Spleen

Tonsils

Question 26

What are function of the spleen?

Answer 26

RBC production in infants
Filter and destroy old RBCs
Produce lymphocytes

Question 27

What is the function of tonsils?

Answer 27

To produce lymphocytes to fight infection

Question 28

What is the most important function of the lymphatic system?

Answer 28

To return proteins into circulation and maintain a low protein concentration in interstitial fluid
-colloid osmotic pressure