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VBSC 421 Lab Exam #3 (#25 Avian Lab)
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VBSC 421 Lab Exam #3 (#25 Avian Lab)
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VBSC 421 Lab Exam #3 (#25 Avian Lab)unique characteristics - ANS-1. physical appearance (feathers, wings)
2. lack of teeth and presence of beak
3. fusion and reduction of bones of hand, head, pelvis
4. pneumatic bones
5. no diaphragm
6. well-developed keel
7. forelimbs specialized for flight
8. uric acid secretion
9. embryonic development outside of body
10. abdominal testes
11. nucleated erythrocytes
12. higher body temp (41*C)
13. single viable oviduct (left)
comb - ANS-external; in domestic chickens; top
wattle - ANS-external; in domestic chickens; lower
tongue - ANS-digestive; first part; in beak
esophagus - ANS-A; digestive;
crop - ANS-B; digestive; enlargement of esophagus; temporarily stores food; produces
crop milk
proventriculus - ANS-C; digestive; true stomach; glandular; one cell produces both HCl
and digestive enzymes
ventriculus (gizzard) - ANS-D; digestive; muscular; gravel is located here to grind food
liver - ANS-digestive; large and red/brown
gallbladder - ANS-digestive; some do not have this organ; located in liver
duodenum - ANS-digestive; surrounds pancreas; loop
small intestine - ANS-F; digestive;
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