Presentation on theme: "Created by Lindsey Blaine for the Phantom Riders 4H Club"— Presentation transcript:
1 Created by Lindsey Blaine for the Phantom Riders 4H Club The Digestive SystemCreated by Lindsey Blaine for thePhantom Riders 4H Club
2 ObjectivesBy understanding the structure and function of the unique digestive system of the horse you can appreciate proper feeding techniquesLabel the structure (anatomy) parts of the digestive systemUnderstand the basic function (physiology) of the digestive system
3 Unique DigestionThe digestive system of a horse is different from other farm animals. The horse has a single compartment stomach like a human or dog but the horse can utilize roughages like a cow or sheep, which are ruminants. This is possible because of a special type of intestine.Digestion is the process of preparing food for absorption from the alimentary canal into the blood stream and elimination of unabsorbed residue from the body.
4 The Mouth The first part of the digestive system Initial breakdown of feedsMastication (chewing)Horses secrete about 10 gallons of saliva a day
5 Pharynx Swallowing (deglutition) 6 inch muscular sac Food must move through pharynx quickly so it doesn’t enter windpipeOnce food/water enter pharynx it cannot return to the mouth due to blocking action of the soft palateFor this same blocking reason, horses cannot breathe through their mouth
6 Esophagus Did you know horses can’t vomit? This muscular tube is inches longExtends from pharynx down left side of neck to the stomachChoke can occur in horses when food or other materials become lodged in the esophagusPeristalsis (wave-like contractions) moves food and water along – it is a one way action
7 StomachThe horse’s stomach is small (8-19 quarts) which makes frequent meals importantSimilar in form to non-ruminantMany types of stomach disorders can occur from improper feeding
8 Small Intestine 70 feet long, holds 48 quarts Makes up 30% of tract Fast rate of passageHorses have no gall bladderAbsorption of many nutrients (amino aids, sugars, fatty acids, minerals, and vitamins) occur hereVilli increase surface area which helps absorption
9 Large IntestineMade up of 4 parts (cecum, large colon, small colon, rectum)CecumMicroorganisms help digestLarge Colon10-12 feet long, diameter 8-10 inchesMore absorptionSmall Colon10-12 feet long, diameter 3-4 inchesWater absorptionCharacteristic balls of feces formedRectumExtends 1 foot from small colon to anusA horse normally voids lbs of manure a day
10 Review Can you name these parts? Anatomy Terms: hindgut Esophagus Small IntestineLarge ColonAnusSmall ColonStomachCecumhindgut
11 But before you move on…Review the material To receive your You’re almost done!But before you move on…Review the materialTo receive yourPhantom Riders HORSE certificate of the Digestive Systemyou must score 80% or higher on the quiz.