Livestock digestive systems
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Livestock Digestive Systems. Today we will…. Identify herbivores, carnivores and omnivores Discuss the pathway which food travels through the digestive system. Construct a monogastric tract. Differences. Different species of animals have different digestive systems due to the food they eat

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Presentation Transcript

Today we will
Today we will…

  • Identify herbivores, carnivores and omnivores

  • Discuss the pathway which food travels through the digestive system.

  • Construct a monogastrictract.


Differences
Differences

  • Different species of animals have different digestive systems due to the food they eat

  • These differences allow the animal to gain the most energy from its digested food

  • The 3 types discussed today are:

    • Omnivores

    • Carnivores

    • Herbivores


Herbivores
Herbivores

  • Depend on plant material to survive, such as grass and leaves

  • Some examples of herbivores are:

    • Rabbits

    • Cattle

    • Deer

    • Sheep

    • Goats

    • Horses

  • Have a long and complex digestive system to break down plant matter.


Carnivores
Carnivores

  • Depends on other animals as a food source

  • Digestive tract is short and simple due to only consuming meat

  • Some carnivores are:

    • Cats

    • Eagles

    • Mountain Lion

    • Snakes

    • Spiders


Omnivores
Omnivores

  • Depend on both plant matter and other animals for food sources

  • Some examples of omnivores are:

    • Chickens

    • Pigs

    • Dogs

    • Bears

    • Humans


What is the pathway for which food travels
What is the pathway for which food travels?

  • The path that most food travels (monogastric animals):

    • Mouth

    • Esophagus

    • Stomach

    • Small Intestine

    • Large Intestine

    • Rectum


Lets get started
Lets get started

  • When eating the mouth works with your teeth and tongue to crush food while pushing it down the throat

  • While in the mouth the salivary glands excrete salivary amylase to chemically break down starch

  • The food travels down the esophagus to the stomach


Churning
Churning

  • Once in the stomach the food will start to churn while adding hydrochloric acid and pepsin

  • When fully mixed and the food has now become a chyme mixture then it leaves the stomach and heads to the small intestine



Small spaces
Small spaces

  • When entering the small intestine the pancreas excretes digestive enzymes and stomach acid-neutralizing bicarbonate

  • The liver also aids the small intestine in digestion by producing bile that is stored in the gall bladder

  • Villi are little finger like folds that help absorb the nutrients

  • The small intestine will due the most digestion in 3 different areas:

    • Duodenum (upper)

    • Jejunum (middle)

    • Ileum (lower)



End of the road
End of the road

  • After leaving the small intestine the remaining food enters the large intestine

  • The large intestine is made of the colon, cecum, and rectum

  • The colon is broken down into four sections

    • Ascending

    • Transverse

    • Descending

    • Sigmoid

  • The cecum is connected by the entrance from the small intestine to the ascending colon

  • The cecum helps with the fermentation of the food

  • The ascending and transverse colon remove the remaining water

  • The descending and sigmoid colon store food until it is removed



Lets watch
Lets watch

  • This video explains how a horse digest food

  • Take notes on what is shown

  • http://www.youtube.com/watch?v=8lqk7igz9L4&feature=related

  • (7:13)


Creation
Creation

  • Using the craft supplies that I have provided, you will create a monogastric digestive tract. (you choose)

  • You also need to write a description of the pathway and what is happening at each step.

  • Label each section when complete:

    • Mouth

    • Esophagus

    • Stomach

    • Small intestine

    • Large intestine


References
References

  • http://ibdcrohns.about.com/od/ucbasics/g/digestivesystem.htm

  • http://www.qrg.northwestern.edu/projects/marssim/simhtml/info/whats-a-herbivore.html

  • http://www.youtube.com/watch?v=8lqk7igz9L4&feature=related

  • http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookdigest.html

  • Pictures: IMSonline.tamu.edu


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