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Digestion in ruminants and rodents

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by

Syana Zein

on 4 February 2013

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Transcript of Digestion in ruminants and rodents

6.4 : FOOD DIGESTION DIGESTIVE SYSTEM
IN
RUMINANTS
AND
RODENTS Our Learning Outcomes for
today:

1. Identify parts of digestive system
in ruminants and rodents
involved in the digestion of
cellulose,
2.Describe the digestion of
cellulose in ruminants and
rodents,
3.Compare and contrast the
digestive process in humans,
ruminants and rodents, Rat’s caecum Rat digestive system Their caecum and appendix are enlarged to store the cellulase producing bacteria
Food pass the alimentary canal
twice
- first as food
- then as soft faeces Digestive System of Rodents Reticulum
- also contains bacteria for
digestion
- content of reticulum called
cud
- regurgitation occurs
- has a ‘honeycomb’ wall Ruminants.. Rabbits and rats family Rodents.. Soft and watery faeces usually produced at night


Eaten again



Pass out as hard and dry faeces during the day omasum abomasum reticulum rumen rumen Ruminants.. Abomasum
- true stomach of the
ruminants
- gastric juice containing
digestive enzymes
- HCl and pepsin Omasum
- reswallowed cud will be sent
here
- large particle are broken
down by peristalsis
- water is removed Ruminants.. Organisms in rumen the saliva of a cow contains no salivary amylase
To digest the plant material, herbivores need to depend on the cellulase-secreting microorganism in its digestive system Ruminants.. Has a stomach with 4 chambers:
1. rumen
2. reticulum
3. omasum
4. abomasum
Carry out rumination – process of regurgitating food and rechewing it Ruminants.. Feed on plant – cellulose
Need cellulase to digest it
But ruminants do not produce cellulase
However their digestive system are specially adapted to carry out cellulose digestion Digestive System of Ruminants Herbivore mammals
Eg. Cow, goat, giraffe, deer
Feed on plant - cellulose Ruminants Digestion in Ruminants & Rodents Rumen
- first & largest compartment
- contain bacteria that produced
cellulase for the cellulose
digestion
- function as the fermentation
chamber Ruminants.. Digest cellulose Re-eat the faeces to absorb more nutrient swallow Small intestine anus caecum stomach esophagus mouth Flow of food in rodents chyme - H2O swallow swallow curd fermentation regurgitation abomasum reticulum mouth rumen esophagus mouth omasum Flow of food in ruminant omasum reticulum
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