Avian Anatomy 3 Flashcards
Whats an oesophagus modification birds have
Crop
What are the two parts the stomach is divided into
Proventriculus (glandular) and gizzard/ventriculus (muscular)
How many caeca do birds have
2
What is the choana
Slit opening to nasal cavity
What are palatine ridges
With caudally facing papillae - food movement
What are infundibular cleft
Auditory tube opening
Does the tongue have muscles
No
What is the function of salivary glands (2)
- Lubricant for food
2. May be sticky
What does swallowing rely on
Relies on raking papillae
What is the function of the crop
- Can store food
- Transport of food
- Site of physical digestion
- Formation of crop milk
What does the proventriculus stomach do
- Dilation
- Papillary projections
- No pyloric sphincter
What does the ventriculus/gizzard stomach do
- thick, discus shaped muscular
- Left of peritoneal cavity
- heavy muscular layers
- Less well defined
What do the intestines terminate
Cloaca
What is the origin of the colon
Junction ileum-colon/rectum
Where is there a sphincter in the colon located
Ileocolic junction
What are the 3 separate chambers of the cloaca
- Coprodeum
- Urodeum
- Proctodeum
Where does the urodeum open
Genital ducts , ureters
Where is the gall bladder absent
Pigeons and parrots
Where do the kidneys and the urethers empty
directly in the urodeum
How many days does it take for sperm to travel from the testes to the end of the ductus
1-4 days
What happens to the right side of the reproductive tract
Right side regresses
What are the 5 parts of the reproductive tract
- Infundibulum
- Magnum
- Isthmus
- Uterus
- Vagina
