DIGESTIVE SYSTEM By: Jamie Casselman

What is the digestive system? A complex group of organs and glands that process the food we eat

It mechanically and chemically breakdowns food into smaller molecules which can be absorbed into the blood stream Excretes waste materials your body can’t use

1. Ingestion 2. Digestion 3. Absorption 4. Elimination

Process of putting food or drink into your mouth

Mechanical:  Begins in the mouth with the teeth and tongue chewing food into pieces you can swallow Chemical:  Salivary glands produce enzymes (amylase), which breaks down complex carbohydrates to simple ones

Swallow Peristalsis

Small intestine:  occurs in the last five meters of called the jejunum and ileum  villi increase the rate of absorption of nutrients Large intestine:  Accepts what the small intestine doesn’t absorb  Absorbs more water and concentrates the wastes

 Undigested materials (feces) from the large intestine pass into the rectum and are eliminated through the anus

Bibliography “Digestive system.” Innerbody.com. 15 September “Human digestive system.” Enchanted learning.com. 20 September McGraw-Hill Ryerson., BC Science 8. Ontario: McGraw-Hill Ryerson Limited, Parker, Nancy Winslow. Organs. New York: Greenwillow Books, 2009.