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avian digestive sys
The Digestive Sysytem, page 41
| Question | Answer |
|---|---|
| What is the main function of the digestive system? | The digestive system functions to utilize food material for the maintenance of all the other systems of the birds body. |
| What does the birds digestive system depend on? | enzymes (proteins) which chemically break down the food |
| What is the mouths function? | The mouth contains slivary glands taht secrete saliva containing enzymes which begin to break down the food. |
| What does a bird not have like humans for the beginning of digestion? | teeth |
| What does the bird do since it doesn't have teeth in the very beginning of digestion? | A bird does not have teeth to chew its food but does have a tongue which pushes the food to the back of the mouth so that it can begin its passage way down the rest of the digestive tract. |
| What is the esophagus? | The esophagus is the tube that connects the mouth with the rest of the digestive tract. |
| What is the crop? | The crop is located in the neck region & is used to store food until the bird is ready to digest more food. |
| What is the proventriculous? | the true stomach |
| What enzymes do the proventriculous or true stomach secrete? | hydrochloric acid (HCI) and pepsin. |
| What is the gizzard? | The gizzard is made up of 2 smooth muscles and contains grit or stones and acts as the birds teeth by grinding food. |
| What is the small intestine made up of? | the duodenum & the lower small intestine. |
| What is the small intestine important for? | the absorption of nutrients |
| What is the cecum? | 2 blind pouches that, like our appendix, have no real function? |
| What is the rectum or large intestine do? | its where additional absorption of water takes place. |
| Where is the pancreas? | the center of the of the duodenal loop |
| What does the pancreas secrete? | pancreatic juice |
| What is the pancreatic juice's function? | it neutralizes the HCl (hydrochloric acid) secreted by the preventriculous and helps break down fat |
| What does the liver produce? | bile |
| what is bile? | a dark green substance that is necessary for the absorption of fats. |
| Where is bile stored? | the gal bladder |
| What happens when food passes into the duodenum? | it causes the gal bladder to empty the bile into the small intestine. |
| The cloaca is the end of what 3 tracts? | digestive, reproductive, and excretory tracts |
| What is the cloaca important for? | important for absorbing any moisture from foodstuffs which will leave the body. |
| Why is the cloaca important for egg laying? | its important since it is here that the egg from the females reproductive tract is flipped in order that it will be laid large end 1st |
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claremosko@yahoo.com