Lecture 22: Lymphatic System

Question 1

Answer 1

1. tonsils
2. thymus
3. spleen
4. lymph nodes

Question 2

Answer 2

1. blood capillaries
2. lymphatic capillary
3. afferent lymphatic vessel
4. lymph node
5. efferent lymphatic vessel
6. lymphatic duct

Question 3

what percent of interstitial fluid is picked up into capillary network? what is left

Answer 3

85% picked up
15% remains there, main content of lymph

Question 4

what is content of lymph

Answer 4

dead cells, dietary fats, pathogen

Question 5

fxn lymph node

Answer 5

filters lymph fluid. removes pathogens. site of proinflammation of B lymphocytes

Question 6

what is the drainage point of lymph duct into venous system

Answer 6

junction of subclavian veins and internal jugular veins

Question 7

Answer 7

1. cervical LN
2. Cisterna chyli
3. Axillary LN
4. Inguinal LN

Question 8

what is the main reservoir of lymph

Answer 8

cisterna chyli.
sits in front of TXII vertebra

Question 9

fxn thymus

Answer 9

t cell maturation. only 2% of t cells successfully pass. after age 30, disappears

Question 10

where is thymus

Answer 10

superior and anterior mediastina, above heart

Question 11

fxn spleen

Answer 11

filter old/damaged RBCs from blood and to store platelets

Question 12

explain visceral surface of spleen

Answer 12

=medial

hilum, where splenic nerve/artery enter and exit.

Question 13

what is long axis of spleen parallel to

Answer 13

rib 10 on left side

Question 14

where is spleen

Answer 14

rib 9,10,11. left hypochondriac region

Question 15

what are the 5 main tonsils

Answer 15

1. pharyngeal- roof pharnyx. largest
   2/3. palatine- behind oral cavity
   4/5. lingual- posterior third tongue

Question 16

which tonsils get removed first

Answer 16

palatine

Question 17

what are tonsils

Answer 17

encapsulated lymphoid tissue. site of proliferation B Lymphocytees

Question 18

Answer 18

1. pharyngeal
   2.palatine
   3.lingual

tonsils

Question 19

where does thoracic duct drain

Answer 19

jxn btw subclavian and internal jugular vein

Question 20

where is thoracic duct located

Answer 20

left side

Question 21

what is the equivalent to thoracic duct but on the right side

Answer 21

right lymphatic duct

Question 22

what region of body does thoracic duct drain

Answer 22

entire body EXCEPT right half of head/neck & right upper limb & right half of thorax

those are drained by right lymphatic duct

Question 23

where does right lymphatic duct empty into

Answer 23

jxn right subclavian and right internal jugular veins.

Question 24

lower limb/pelvis drainage

Answer 24

1.inguinal LN (also receives anterior abdo wall)
2.pelvic LN
3.lumbar trunks
4. cisterna chyli

Question 25

abdo lymph drainage

Answer 25

alimentary canal, liver, pancreas, spleen drain into pre-aortic LN and then to cisterna chyli via intestinal trunks lymph of posterior abdo wall, kidneys, gonads, adreansl drain into para-aortia LN, then cisterna chyli thru lumbar trunks

Question 26

thorax lymph drainage

Answer 26

parasternal, diaphragmatic, intercostal, mediastinal LN. empties into thoracic duct on left, and right lymphatic duct on right side via bronchomediastinal trunk

Question 27

head/neck lymph drainage

Answer 27

superficial and deep LN which eventually drain into left thoracic duct and right lymphatic duct via jugular trunks

Question 28

upper limb lymphatic drainage

Answer 28

acillary LN subclavian trunk right lmphatic duct and thoracic duct