Lymphoid Organs and Tissues

Question 1

primary lymphoid organs

Answer 1

thymus
bursa of fabricius (only found in birds)
peyer’s patches

Question 2

what is the primary function of primary lymphoid organs

Answer 2

regulate the lymphocyte maturation

Question 3

secondary lymphoid organs

Answer 3

lymph nodes
spleen
tonsils

Question 4

what is the primary function of secondary lymphoid organs

Answer 4

trap and process antigens

mature lymphocytes that mediate immune responses

Question 5

located in the cranial thorax and is largest is size when animal is young

Answer 5

thymus

Question 6

what is responsible for most of the production of T cells

Answer 6

thymus

Question 7

T cells leave the thymus and travel where

Answer 7

secondary lymphoid organs

Question 8

what are T cells important in stimulating

Answer 8

cell mediated immune response

Question 9

what is found only in birds and is similar in structure and function to the thymus

Answer 9

bursa of fabricius

Question 10

located in the wall of the small intestine, structure and functions vary upon species

Answer 10

peyers patches

Question 11

peyers patches activate B cells to produce what

Answer 11

antibodies

Question 12

what do secondary lymphoid organs do in response to antigenic stimuation

Answer 12

enlarge

Question 13

small, kidney bean shaped filters in lymphatic vessels

Answer 13

lymph nodes

Question 14

how is lymph node divided

Answer 14

cortex and medulla

Question 15

what is located in the cortex of the lymph node

Answer 15

nodules

Question 16

what can lymph nodes give us clues about

Answer 16

health of the animal

Question 17

what do lymph nodes do to the the organs they are associated with

Answer 17

drain them

Question 18

why do lymph nodes enlarge, making them more easily palpated

Answer 18

in response to antigenic stimulation

Question 19

what diagnostic test and cytology (to evaluate abnormalities) can be used to collet a microscopic sample of the lymph node

Answer 19

fine needle aspiration (FNA)

Question 20

tongue shaped organ located on the left side of the abdomen - near the stomach in simple stomached animals, near the rumen in ruminants

Answer 20

spleen

Question 21

the spleen is covered with a capsule made up of what

Answer 21

fibrous connective tissue and smooth muscle

Question 22

the capsule of the spleen sends out branches called what, into the soft tissue of the spleen

Answer 22

trabeculae

Question 23

what does the spleen do when its smooth muscle contract

Answer 23

squeezes stored blood cells back into circulation

Question 24

two parts of the soft tissue interior of the spleen

Answer 24

white and red pulp

Question 25

part of the spleen that is formed of localized areas of lymphoid tissue containing lymphocytes that can clone themselves during an immune response

Answer 25

white pulp

Question 26

part of the spleen that consists of blood vessels, tissue macrophages and blood cell storage spaces called sinuses

Answer 26

red pulp

Question 27

what secondary lymphoid organ acts as a reservoir for blood when the animal is at rest

Answer 27

spleen

Question 28

nodules of lymphoid tissue that are covered with a capsule

Answer 28

tonsils

Question 29

what do the tonsils in the throat do

Answer 29

prevent the spread of infection into the respiratory and digestive systems

Question 30

what lives in tonsils

Answer 30

mature lymphocytes

Question 31

tonsils are different than lymph nodes because they are found close to what

Answer 31

moist epithelial surfaces

Question 32

where else are tonsils found in the body

Answer 32

larynx, intestine, prepuce and vagina