E2 - The digestive system of domestic birds Flashcards
1
Q
Digestive system
Main divisions of the digestive system
(what should be included in the topic)
A
- Beak
- Esophagus
- Stomach
- Small intestines
- Liver
- Pancreas
- Large intestines
2
Q
Digestive system
Beak
A
-
Oropharynx:
- Palatine ridges, medial & caudal
-
Choana
- One opening
- 2 nasal cavities separated by vomer
- Infundibulum / auditory tubes
- Mechanical papillae
- Glottis
- Palatum durum
- Ø epiglottis
- Ø teeth
- Ø taste buds
- Ø gustative papillae
- Ø soft palate
- Tongue does not have its own musculature
- Muscles originate from control(?) tongue
- Linea papillaris at back of tongue
- Muscles originate from control(?) tongue
3
Q
Digestive system
Esophagus
A
-
Crop:
- Functions as storage
- Allows reguritation for feeding chicks
- Crop milk in pigeons
4
Q
Digestive system
Stomach
A
- 2 stomachs:
- 1 glandular
- Similar to mammilian stomach
- Opens into muscular stomach
- 1 muscular
- Crushes seeds
- Cuticula (layer inside)
- 1 glandular
5
Q
Digestive system
Small intestines
A
-
Duodenum:
- Pancreasin betweenascendinganddescending parts
-
Jejunum:
- Diverticulum ductus vibellointerinalis(?) meckelii (embryonic reminants, anywhere on jejunum)
-
Ileum:
- Longer in omnivores than carnivores
- Fermentation
6
Q
Digestive system
Liver
A
- Double lobed
- One bile duct emptying into duodenum
- One bile duct emptying into gall bladder
- Gall bladder is not present in all species
7
Q
Digestive system
Pancreas
A
- Double lobed
- 3 ducts opening into duodenum
8
Q
Digestive system
Large intestines
A
-
Cecum:
- Paired ceca
- Ø appendix
-
Colorectum
- Terminal part, opens into cloaca
- Has holes for intestine
- Urinary tract and genital tract is fused
-
Cloaca:
- Coprodeum (plica coprourodealis)
- Urodeum (plica coprourodealis, plica uroproctodealis)
- Proctodeum (plica uroproctodealis)
- Ventrus
9
Q
Digestive system
Draw the digestive system of domestic birds
A
