Digestive System How our body gets energy and gets rid of waste

Digestive System

• Function– To get energy out of the food and liquids we eat by breaking it down

• Doctor: Gastroenterologist

Digestive System

• Types of Digestion– Mechanical – physical movement of the

food to break it down. Happens in the mouth, stomach.

– Chemical – when chemicals are added to the food to break it down. Happens in the mouth, stomach, and small intestine

– Nutrient Absorption – taking the good stuff the body needs out of the food. Happens in the small intestine.

– Water Absorption -- taking the water out of the food and liquids you eat. Happens in the large intestine or colon.

Digestive System – Structure • Structure is the look and size of a part.

Parts of the Digestive System

• Mouth – Mechanical digestion using the teeth and chemical digestion from the chemicals released from the salivary glands.

• Esophagus – Mechanical Digestion by pushing the food from the mouth to the stomach

• Stomach – Mechanical digestion through churning the food and Chemical Digestion with the chemicals given from the liver, gallbladder, and pancreas.

• Liver/Gallbladder/Pancreas – gives chemicals to the stomach to help breakdown. Bile and insulin are chemical names.

• Small Intestine –finishes digestion through chemical digestion and absorbs nutrients. Examples are minerals, vitamins, proteins, carbohydrates, and fats.

• Large Intestine/Colon – absorbs water and makes solid waste• Rectum/Anus – gets rid of solid waste

Mouth

Esophagus

LiverStomach

Gallbladder Pancreas

Colon/Large Intestine Small Intestine

Appendix Rectum

Anus

Homeostasis

• All parts of your body working together to be healthy and balanced.

• How does your digestive system help keep your body in homeostasis?– Gets energy– Removes solid waste