 Identify herbivores, carnivores and omnivores  Discuss the pathway which food travels through the digestive system.  Construct a monogastric tract.

 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

 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.

 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

 Depend on both plant matter and other animals for food sources  Some examples of omnivores are:  Chickens  Pigs  Dogs  Bears  Humans

 The path that most food travels (monogastric animals):  Mouth  Esophagus  Stomach  Small Intestine  Large Intestine  Rectum

 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

 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

 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)

 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

 This video explains how a horse digest food  Take notes on what is shown  L4&feature=related L4&feature=related  (7:13)

 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

 gestivesystem.htm gestivesystem.htm  arssim/simhtml/info/whats-a-herbivore.html arssim/simhtml/info/whats-a-herbivore.html  L4&feature=related L4&feature=related  e/biobk/biobookdigest.html e/biobk/biobookdigest.html  Pictures: IMSonline.tamu.edu