Lymphatic System

Question 1

Where does lymph enter the vein?

Answer 1

At the junction of the internal jugular veins

Question 2

What is the lymphatic system made up of? (5)

Answer 2

Lymphatic vessels
Lymph
Lymphoid tissue
Lymph nodes
Lymphatic organs

Question 3

Where do the lymphatic vessels begin?

Answer 3

At the capillaries

Question 4

What is the general function of the lymphatic system?

Answer 4

Maintains fluid balance in the body
Immunity
Fat absorption

Question 5

What is lymph collected from?

Answer 5

Interstitial fluid, which fills spaces between cells

Question 6

What are the lymphatic vessels?

Answer 6

Lymphatic capillaries
Lymphatic vessels (lymphatics)
lymphatic trunks
Thoracic duct and right lymphatic duct

Question 7

What are lacteals?

Answer 7

Capillaries originating in small intestinal villi

Question 8

Describe lymphatic capillaries

Answer 8

Only open on one end
Has clefts that interstitial fluid enters through
Has valves that ensure one way flow of lymph out of tissue

Question 9

Describe lymphatic vessels (lymphatics)

Answer 9

Resembles veins in structure
Thinner walls
More valves
Contain lymph nodes

Question 10

Describe lymphatic trunks, and ducts

Answer 10

Lymphatic trunks, drain lymph from lymphatic vessels

They merge to form the thoracic duct and right lymphatic duct

Question 11

Name the 5 lymphatic trunks

Answer 11

Jugular
Subclavian
Broncomediastinal
Lumbar
Intestinal

Question 12

Described the circulation of lymph

Answer 12

Fluids from lymphatic capillaries, to larger vessels, reenters blood at junction of internal jugular and subclavian vein

Lymphs > trunks > ducts

Question 13

There are more afferent than efferent lymphatic vessels

Answer 13

True

Question 14

What is the flow of lymph called?

Answer 14

Lymphokinesis

Question 15

What affects pressure in lymphatic vessels?

Answer 15

Skeletal muscle pump
respiratory pump

Question 16

What is a special x-ray of the lymph nodes called?

Answer 16

Lymphangiogram

Question 17

How does the skeletal muscle pump work in affecting the flow of lymph?

Answer 17

When muscles contract, they squeeze the vessels pushing liquid in one direction as well as prevent them from going backwards

Question 18

What are lymph nodes?

Answer 18

What structure is enclosed by a fibrous capsule?

Question 19

Where are lymph nodes found?

Answer 19

All along lymphatic vessels, they serve as checkpoints to filter out, harmful microbes from lymph

Question 20

Name the internal structures of a lymph node

Answer 20

Afferent vessels
Subscapular sinus
Trabecular sinus
Medullary sinus
Efferent vessel

Question 21

Name three regional lymph nodes

Answer 21

Cervical
Axillary
Inguinal

Question 22

What is the cisterna chyli?

Answer 22

Drains lymph from the digestive organs

Question 23

What are the functions of lymph nodes in terms of defense?

Answer 23

Filtration
Phagocytosis
Infection/ inflammation when overwhelmed

Question 24

Name three lymphatic organs

Answer 24

Tonsils
Thymus
Spleen

Question 25

What are the tonsils?

Answer 25

Mass of lymphoid tissue under mucous membranes in the mouth and back of throat

Question 26

Name the 3 locations of the tonsils

Answer 26

Palatine Pharyngeal Lingual

Question 27

Describe the thymus. (What and where)

Answer 27

Primary organ of the lymphatic system Located in the mediastinum

Question 28

Name the functions of the thymus

Answer 28

Vital role in immunity Source of lymphocytes before birth Begins secreting thymosin after birth that enables lymphocytes to develop into T-cells

Question 29

Where in the thymus do T cells mature?

Answer 29

Medulla

Question 30

Where is the spleen located?

Answer 30

In the left hypocondrium

Question 31

Name some functions of the spleen

Answer 31

Defense Tissue repair Hematopoiesis RBC and platelet destruction Blood reservoir

Question 32

What is lymphedema?

Answer 32

Blockage of lymph vessels resulting in swelling of extremities

Question 33

What is lymphangitis?

Answer 33

Inflammation of lymph vessels

Question 34

What is elephantiasis?

Answer 34

Also called filariasis Infection caused by parasites that damages the lymphatic system