1st exam (Definitions) Flashcards
subgroup of saurischian dinosaurs with feathers; birds
Aves
distensible diverticulum of the avian lung
air sac
unique lymphoid tissue
supplement thymus function
Bursa of Fabricius
appendages from the shaft (rachis) of the feather;
base for flanges and barbules
barb
appendage from a bard; possess hooklets for interlocking with the flange of other feathers
barbules
avian voicebox
dividing wall between bronchi forms sound-producing folds
bronchial syrinx
avian voicebox
resonating chamber formed between both tracheal and bronchial rings
bronchotracheal syrinx
three fused carpals and metacarpals in a bird’s hand
carpometacarpus
small fluffy feather with a crown of barbs lacking hooklets
down feathers
pit lined with epidermis for the developing feather
feather follicle
epidermal cover of developing feather
feather sheath
branch of feather barb that interlocks with barbules of adjacent feather
flange
grinding portion of avian (and archosaur) stomach
gizzard
cutaneous sensory receptor along the beak of aquatic birds
Grandry’s follicle
albumen-secreting area in avian oviduct
magnum
duct between the young chick’s yolk sac with the intestines
Meckel’s diverticulum
birds with teeth on the jaw
odontognath
terminus of the oviduct
oviductal funnel (infundibulum)
mass of lymph nodules in the ileum
Peyer’s patch
domesticated birds kept by humans for meat and egg production
poultry
spine of feather
rachis
avian penis
rudimentary pillus
uterus portion of oviduct
specialized for deposition of coatings on eggs
shell gland
bird voice box wherein the trachea itself vibrates
tracheal syrinx
rump-like tail of birds
uropygium
epidermal oil gland in birds
uropygial (preen) gland
hollow, honeycombed structure
lightweight
Pneumatic bones
high calcium storage (hens)
Medullary bones
bones for support / sturdiness
Fused bones
new air → post. air sac
old air (from lungs) → ant. air sac
Inhalation
post- air sac → lungs
ant. air sac → trachea
Exhalation
