ch 22 - lymphatic

Question 1

lymphatic system

Answer 1

Cell tissues and organs responsible for defending the body from environmental hazards and internal threats

Question 2

immune system

Answer 2

all body cells and tissues are involved in immunity, including parts of the lymphatic, integumentary, skeletal, cardiovascular, respiratory, and digestive systems

Question 3

immunity

Answer 3

the ability to resist infection and disease

Question 4

pathogens

Answer 4

organisms that cause disease, such as viruses, bacteria, fungi and parasites

Question 5

lymph

Answer 5

fluid similar to plasma but w/o plasma proteins

Question 6

lymphatic vessels

Answer 6

carry lymph from peripheral tissues to veins

Question 7

lymphoid tissues

Answer 7

Connective tissues dominated by lymphocytes

Question 8

lymphoid organs

Answer 8

organs where lymphocytes may form, mature or become activated

Question 9

lymphoid organs ex

Answer 9

lymph nodes, thymus, spleen

Question 10

lymphatic vessels

Answer 10

carry lymph from peripheral tissues to the venous system

Question 11

meningeal lymphatics

Answer 11

vessels found in dura mater that drains CSF to cervical lymph nodes, remove waste

Question 12

Lymphatic capillaries

Answer 12

smallest lymphatic vessels, present at almost every tissue of the body

Question 13

lymphedema

Answer 13

Obstruction of lymphatic vessels that prevent lymph drainage

Question 14

superficial lymphatics

Answer 14

vessels in the subcutaneous layer, areolar layer of mucous membranes

Question 15

deep lymphatics

Answer 15

larger vessels that accompany arteries and veins

Question 16

superficial and deep lymphatics converge to form large lymphatic trunks that emoty into 2 major collecting vessels:

Answer 16

thoracic duct

right lymphatic duct

Question 17

thoracic duct

Answer 17

collects lymph from all body regions below the diaphragm and left side of the body above the diaphragm

Question 18

right lymphatic duct

Answer 18

collects lymph from right side of body superior to the diaphragm

Question 19

lymphocytes

Answer 19

immune system cells that respond to specific invading pathogens

Question 20

examples of lymphocytes

Answer 20

T cells
B cells
NK cells

Question 21

lymphatic nodules

Answer 21

areolar tissue densely packed w/ lymphocytes

Question 22

germinal center

Answer 22

central zone of the nodule which contains dividing lymphocytes

Question 23

tonsils

Answer 23

large lymphoid nodules in the wall of the pharynx

Question 24

pharyngeal tonsil

Answer 24

in the posterior wall of the nasopharynx

Question 25

L + R palatine tonsils

Answer 25

at the posterior inferior margin of the oral cavity

Question 26

lingual tonsils

Answer 26

deep to the pithelium, covering base of the tongue

Question 27

tonsilitis

Answer 27

inflamamtion of tonsils, esp palatine

Question 28

Mucosa-associated lymphoid tissue (MALT)

Answer 28

lymphoid tissues associated w/ the mucosa of the digestive, respiratory, urinary, and reproductive systems

Question 29

Aggregated lymphoid nodules

Answer 29

Clusters of lymphoid nodules deep to intestinal epithelial lining

Question 30

lymph nodes

Answer 30

small lymphoid organs found along lymphatic vessels

Question 31

trabeculae

Answer 31

bundles of collagen fibers that extend from capsule into the interior of the lymph node

Question 32

hilum

Answer 32

shallow indentation where blood vessels and nerves reach the lymph node

Question 33

afferent lymphatics

Answer 33

carry lymph from peripheral tissues TO the lymph node

Question 34

efferent lymphatics

Answer 34

carry lymph AWAY from the lymph node

Question 35

cortex of lymphoid

Answer 35

outer region that contains B cells within germinal centers

Question 36

paracortex of lymphoid

Answer 36

contains mostly T cells

Question 37

medulla of lymphoid

Answer 37

inner region organzied into medullary cords

Question 38

lymphadenopathy

Answer 38

refers to disease of the lymph nodes

Question 39

each lobe of the thymus has

Answer 39

outer coretx of epithelial reticualr cells inner emdulla of epithelial reticular cells in concentric layers called thymic (Hassall;s) corpuscles

Question 40

epithelal reticular cells function

Answer 40

maintain blood thymus barrier

Question 41

spleen

Answer 41

large lymphoid organ lateral to the stomach by the gastrosplenic ligament

Question 42

spleen function

Answer 42

filters blod stores iron immune response to antigens

Question 43

pulps of the spleen

Answer 43

red pulo contains RBCs white pulp resembles lymphoid nodules