Ruminant And Avian Digestion Flashcards
What are the four chambers of the stomach in rumens
Rumen
Reticulum
Omasum
Abomasum
What is the function of the rumen
Fermentation occurs
Anaerobic environment
Microbes secrete enzymes
Saliva creates a suitable environment for micro flora
What is the function of the rectum
Collects smaller particles of food which moves into the omasum
Larger particles are brought back up for more mechanical digestion- retro peristalsis
What is the function of the omasum
Some water and salts are reabsorbed
Remaining matter is passed onto the abomasum
What is the function of the abomasum
True stomach with digestive enzymes and acids
In avian digestion, what is the crop
Temporary storage and is located above the breast
Avian digestion:
What is the first two important information about how avian digestion is different
Birds do not chew- use tongue to move food to the back of the throat where it is swallowed
Move food from the oesophagus to the crop
Pass to the proventriculus- digestive enzymes and hydrochloric acid
Avian digestion:
What are the last two important information about how bid digestion is different
Moves to the ventriculus (gizzard)- mechanically digested
moves to caeca where water is reabsorbed and food is fermented.
Cloaca- end of digestive system, urinalysis and digestive waste is expelled as one substance.
EXAM QUESTION: (4 marks)
Fill in the missing gaps
Omasum-
- catches foreign objects and works alongside the rumen
Rumen-
-where enzymes break up food and this is the true stomach
Some water and salts are reabsorbed
Reticulum
Fermentation occurs/ microbes secrete enzymes
Abomasum
EXAM QUESTION: (3 marks)
Explain how birds break down their food without having teeth
Uses tongue to move food to back of mouth (1)
Store in crop (1)
Gizzard mechanically digests (1)
