Middle Avian

isabellepjk's version from 2017-04-27 14:39

Lecture 3

Question Answer
what is patagium?wing web. (play pattycake with the patagium)
what is pinioning?tenectomy of extensor carpi radialis
what does NOT extend from extensor fossa of femur?long digital extensor
what is the tibial cartilage? what passes over it? what passes through it?fibrocartilagenous pad lies over plantar surface of tibiotarsus. gastroc/sdf go over it, DDF go THROUGH it.
where is there a meniscus in the pelvic limb of the bird?lateral menescus of intertarsal joint
what joint flexes to cause rest of flexion in leg? what could this be called?the tarsus. a reciprocal apparatus. **cannot extend digits when tarsus is flexed
instead of teeth, birds have...tomia of rhampotheca
papillae in oropharanx?caudally directed mechanical papillae
how would you describe bird saliva?thick and sticky
what is the choana?physiological cleft palate
opening of auditory tubes is?infundibular opening
what is their "larynx"?laryngeal mound
where is the esophagus in relation to the trachea?RIGHT SIDE!!
esophagus dilates near thoracic inlet. known as?ingluvies!! (crop)
purpose of crop/ingluvies?temp storage of food, produce crop milk to feed babies
describe carnivorous-type stomach?proventriculus(glandular) and ventriculus(thin walled muscular)....designed more for storage and chemical break down than mechanical break down.
what produces HCl and pepsin in stomach?oxynticopeptic cells.
what is a pellet?regurgitated fur, bones, etc of meal. (regurg 6-10 hrs after meal)
describe non-carnivorous type of bird stomach?prventriculus(glands)+ventriculous(muscular! dark colored due to lots of myoglobin) connected via isthmus.
in non-carnivorous ventriculous, which parts are thick/thin? what is the protective liner called?cr and ca sacs thinner, middle (dorsal and ventral) portions thick... KOILIN= cuticle
where is the pancreas?in duodenal loop (between ascending and descending limbs)
how can you tell the jejunum from the ileum?vitelline (meckels) diverticulum is there, its where the yolk used to be attached.
what about the cecum of a bird? unique things?ITS CECA-- as in paired! Usually pretty long (but absent in psittacine (parrots) birds and short in pigeon) at the base of the ceca are CECAL TONSILS. ceca for fermentation/water absorption
how many bile ducts? names?2. hepatoenteric, cystoenteric
lobes of liver? gall bladder?L and R lobes. Gallbladder connected to R lobe.
3 parts of cloaca/separations and the external opening?corpodeum(poop), urodeum(pee, also gets ductus deferens/oviduct) <--these separated by coprourodeal fold. also proctodeum (repro stuff happens here). Opening=VENT
what are bird nares protected by? what can nares be surrounded by in some species? shelf-like operculum protects. can be surrounded by cere.
how does nasal cavity communiate with oropharynx?choana
whats up with the infraorbital sinus?communicates with caudal conchae. Subject to infections.
what is up with the nasal gland?gland dorsal to orbit. opens into nasal cavity. "SALT GLAND" which allows certain birds to drink salt water and then secrete a hypertonic solution of salt from it so they dont dehydrate
what is the laryngeal mound formed by?cricoid and aryetnoid cartilages
unique about trachea?COMPLETE CARTILAGE RINGS (shape or conformation of trachea changes based on species)
what is the syrinx? where is it? gender diff?source of vocalization! at tracheal bifurcation. tympaniform membranes are vibrated to make sounds. BULLA portion is a big bulge that dampens their sound (on L principal bronchus)
what holds lungs in place?horizontal septum
two parts of lung are? relative amt?paleopulmo(old-90%) and neopulmo (new-10%)
describe setup of paleopulmoarranged in arch-like connecting loops between 2 secondary bronchi-- ONE WAY FLOW
describe setup of neopulmonetwork of anastomosing bronchi- TWO WAY FLOW though parabronchi
what do parabronchi of lungs represent?"tertiary bronchi"
order of spaces from lumen of parabronchi are?atria-->infundibula-->air capillaries (heart funneling blood)
what are air sacs? what do they do?thin walled extensions of resp system-- aid in mvmt of air through lung (NO GAS XCHANGE HERE).
how many air sacs in chicken? where?8. There is clavicular, cervical, cranial thoracic(2), caudal thoracic (2), abdominal (2)
which air sacs are associated with which type of lung?paleopulmo= cranial air sacs= (clavicular, cervical, cr thoracic). Neopulmo= caudal air sacs= (caudal thoracic, abdominal)
what part of bird gets first-pass fresh air, and how?the caudal air sacs via expressway bronchi
type of air cranial air sacs get?semi-used because it passed through parabronchi already.
how is it that birds get gas exchange during inhalation and exhalation?air goes through lungs (or bypasses) on inspiration, go into air sacs, on expiration the air in airsacs is passed through the lungs again for more exchange (some used, some unused)