Lymphatic System

Question 1

Purpose of Lymphatic System

Answer 1

returns fluid leaked from blood vessels back to the blood vessels

Question 2

3 Parts of the Lymphatic System

Answer 2

Lymphatic vessel, lymph fluid, lymph node

Question 3

Lymphoid organs

Answer 3

spleen, thymus, tonsils, MALT, peyers patches, appendix, red bone marrow

Question 4

Lymphatic vessels

Answer 4

inersitial fluid enters where it changes to lymph fluid, unidirectional flow

Question 5

intersitial fluid

Answer 5

when fluid exits blood vessels and washes around the tissues

Question 6

Flow of lymph fluid

Answer 6

lymphatic capillary to lymphatic collectiong vessels to node to trunk to duct and back to blood vessels

Question 7

Lymphatic Capillaries

Answer 7

very permeable due to overlapping endothelial cells that form valve flaps in the walls of vessels

Question 8

Function of Lymphatic Capillaries

Answer 8

drain fluid, proteins, pathogens, debris, and cancer cells

Question 9

Lacteals

Answer 9

set of specialized capillaries

Question 10

Lacteal Function

Answer 10

absorb digested fats from intestine, turning the clear lymph fluid into milky fluid called Chyle

Question 11

Location of Lacteals

Answer 11

villi of intestinal mucosa

Question 12

Where are not capillaries not found?

Answer 12

bones, teeth, bone marrow, CNS

Question 13

Collecting vessels

Answer 13

have 3 tunics, thinner walls, more valves, anastomose

Question 14

Superficial Vessels

Answer 14

in skin, travel with veins

Question 15

deep vessels

Answer 15

of the trunk, travels with arteries

Question 16

Lymphatic Trunks

Answer 16

collecting vessels fuse to form trunks

Question 17

5 lymphatic trunks

Answer 17

lumbar, subclavian, jugular, intestinal

Question 18

Lymphatic duct

Answer 18

2 large ducts in thoracic region

Question 19

right lymphatic duc

Answer 19

drains lymph from right side of head and throrax + arm

Question 20

thoracic duct

Answer 20

much larger and drains lymph from rest of the body. often formed from an enlarged sac, the cistera chyli

Question 21

Lymph Clusters

Answer 21

neck, shoulder, groin

Question 22

Transport of lymph

Answer 22

no pump + low pressure=sporadic flow

Question 23

What does the flow of lymph depend on?

Answer 23

skeletal and respiratory muscles, valves prevent backflow, pulsating action of adjacent arteries

Question 24

Lymphedema

Answer 24

lymphatic obstruction, localized fluid retention and tissue swelling

Question 25

Lymph Nodes

Answer 25

cluster along lymphatic vessels where they merge to form trunks

Question 26

two functions of lymph nodes

Answer 26

filter microorganisms and debris from lymph, activate immune system

Question 27

structure of lymph node

Answer 27

1" bean, surrounded by fibrous capsule, trabeculae divide node into compartments

Question 28

Outer cortex of lymph node

Answer 28

t-cells temporarily rest here

Question 29

Medullary Cords

Answer 29

cortex things and tissues form extensions

Question 30

Lymph Sinus

Answer 30

found throughout nodes, house macrophages

Question 31

Lymph flow through nodes

Answer 31

lymph to vessels to subscabular sinus to smaller sinus in cortex flowing over RF, cleaning to exiting the node at the hilus via efferent vessels to blood stream

Question 32

lymphoid tissues

Answer 32

scattered around in body and organs and connective tissue

Question 33

tissue type of lymphoid tissue

Answer 33

reticular

Question 34

function of lymphoid tissue

Answer 34

to protect the body 1. proliferation site for hypothesis 2. ideal surveillance point for lymphocytes and macrophages

Question 35

macrophages

Answer 35

live on reticular fibers

Question 36

lymphocytes

Answer 36

circulate between blood system and reticular tissue

Question 37

spleen (7)

Answer 37

largest, site of lymphocyte proliferation, immune surveillance, removes aged and defective blood cells and platelets, houses macrophages

Question 38

how does the spleen cleanse the blood?

Answer 38

removes aged and defective blood cell and platelets

Question 39

what is stored in the spleen?

Answer 39

stores breakdown products of RBC for later use

Question 40

structure of spleen

Answer 40

outer fibrous capsule, trabeculae externs inwards, white pulp, red pulp

Question 41

white pulp

Answer 41

lymphocytes, found around branches of arteries

Question 42

red pulp

Answer 42

rest of splenic tissue, disposal of debris

Question 43

thymus

Answer 43

lower neck, most active in childhood, immunocompetent t-cells

Question 44

outer cortex of the thymus

Answer 44

densely packed, dividing t lymphocytes

Question 45

inner medulla of thymus

Answer 45

thymic corpuscles- degenerating cells

Question 46

function of the thymus

Answer 46

t-lymph maturation, thymocytes, thymosin and thymopoietin

Question 47

Tonsils

Answer 47

simplests, in pairs

Question 48

palatine tonsils

Answer 48

posterior oral cavity, largest and often infected

Question 49

lingual tonsil

Answer 49

base of tongue

Question 50

pharyngeal tonsil

Answer 50

posterior wall of nasopharynx

Question 51

tubal tonsil

Answer 51

surround eustachian tube, smallest

Question 52

function of tonsils

Answer 52

epithelium folds inward to form crypts that trap bacteria, move into lymphoid tissues and destroy it

Question 53

peyers patch's

Answer 53

wall of ileim

Question 54

appendix

Answer 54

sample of bacteria in GI system

Question 55

MALT

Answer 55

mucosa-associated lymphatic tissue