1st exam (Definitions)

Question 1

subgroup of saurischian dinosaurs with feathers; birds

Answer 1

Aves

Question 2

distensible diverticulum of the avian lung

Answer 2

air sac

Question 2

unique lymphoid tissue

supplement thymus function

Answer 2

Bursa of Fabricius

Question 2

appendages from the shaft (rachis) of the feather;

base for flanges and barbules

Answer 2

barb

Question 3

appendage from a bard; possess hooklets for interlocking with the flange of other feathers

Answer 3

barbules

Question 3

avian voicebox

dividing wall between bronchi forms sound-producing folds

Answer 3

bronchial syrinx

Question 4

avian voicebox

resonating chamber formed between both tracheal and bronchial rings

Answer 4

bronchotracheal syrinx

Question 5

three fused carpals and metacarpals in a bird’s hand

Answer 5

carpometacarpus

Question 6

small fluffy feather with a crown of barbs lacking hooklets

Answer 6

down feathers

Question 7

pit lined with epidermis for the developing feather

Answer 7

feather follicle

Question 8

epidermal cover of developing feather

Answer 8

feather sheath

Question 9

branch of feather barb that interlocks with barbules of adjacent feather

Answer 9

flange

Question 10

grinding portion of avian (and archosaur) stomach

Answer 10

gizzard

Question 11

cutaneous sensory receptor along the beak of aquatic birds

Answer 11

Grandry’s follicle

Question 12

albumen-secreting area in avian oviduct

Answer 12

magnum

Question 13

duct between the young chick’s yolk sac with the intestines

Answer 13

Meckel’s diverticulum

Question 14

birds with teeth on the jaw

Answer 14

odontognath

Question 15

terminus of the oviduct

Answer 15

oviductal funnel (infundibulum)

Question 16

mass of lymph nodules in the ileum

Answer 16

Peyer’s patch

Question 17

domesticated birds kept by humans for meat and egg production

Answer 17

poultry

Question 18

spine of feather

Answer 18

rachis

Question 19

avian penis

Answer 19

rudimentary pillus

Question 20

uterus portion of oviduct

specialized for deposition of coatings on eggs

Answer 20

shell gland

Question 21

bird voice box wherein the trachea itself vibrates

Answer 21

tracheal syrinx

Question 22

rump-like tail of birds

Answer 22

uropygium

Question 22

epidermal oil gland in birds

Answer 22

uropygial (preen) gland

Question 23

hollow, honeycombed structure

lightweight

Answer 23

Pneumatic bones

Question 24

high calcium storage (hens)

Answer 24

Medullary bones

Question 25

bones for support / sturdiness

Answer 25

Fused bones

Question 26

new air → post. air sac
old air (from lungs) → ant. air sac

Answer 26

Inhalation

Question 27

post- air sac → lungs
ant. air sac → trachea

Answer 27

Exhalation