THE DIGESTIVE SYSTEM OF
VERTEBRATES
BIRDS: Chicken

Leghorn
chicken (photo from Poultry Health Management, Veterinary
College, NCSU) (from CD
Chapter 2)
Figure 5.5. Chicken (Gallus
domesticus) digestive tract
(Stevens & Hume 1995)
(from CD
Chapter 5)
Table 8.2. (from CD
Chapter 8)

Table 8.10. (from CD
Chapter 8)

Enzyme
activities expressed as the equivalent amount of bovine trypsin (casein
or BAEE) or chymotrypsin (BTEE) under the same conditions. *A:
200-1,200 g RNase per gram pancreatic tissue; B: 20-100 g per gram
pancreatic tissue; C: 0-20 µg RNase per gram pancreatic tissue. (from
Vonk and Western 1984)
Table 8.11. (from CD
Chapter 8)

0, no absorption or transfer; + to
+++, degrees of absorption or transfer. (from Brambell 1970)
Table 9.4.
(from CD
Chapter 9)
Table 11.3. (from CD
Chapter 11)

Abbreviations: SOM, somatostatin;
APP, avian pancreatic polypeptide; PYY, polypeptide YY; GLUC, glucagon;
SEC, secretin; VIP, vasocative intestinal peptide; GAS, gastrin; CCK,
cholecystokinin; NT, neurotensin; BN, bombesin; SP, substance P; ENK,
leu-enkephaline; MOT, motilin; 5-HT, serotonin. PYY data
(El-Salhy et al. 1982,
recently hatched chicks), ENK data (Alumnets et al. 1978,
chickens), 5-HT data (unpublished
observations, chicks at hatching), CCK duodenum data (Larrson and
Rehfeld 1977, chickens), All other data (Rawdon and Andrew 1981, chicks
at hatching). (from Rawdon 1984)