Transcript Digestive System A. Food must be broken down into nutrients in a

Digestive System
Digestive System
Food must be broken down into nutrients in a
form the body can use.
The breaking down of food into simpler
substances for use by the body is the job of the
digestive system.
The digestive system is a coiled, muscular
tube (6-9 meters long) beginning with the
mouth and ending with the anus
Digestion
Digestion is the process by which food is
converted into soluble forms
Digestive System Notes
7th Grade Science
Unit 4
Forms of Digestion
Stages of Digestion
Primary Digestive Organs
Peristalsis
and through the digestive
system
Primary Digestive Organs (cont’d)
Rectum – temporary storage site for solid
waste
Accessory Digestive Organs
The accessory organs are connected by ducts to the duodenum, which is
the first part of the small intestine.
Care of the Digestive System
• Eat foods that are high in fiber like fruits
and vegetables
Drink plenty of water
Chew your food completely before you swallow
Avoid foods high in fat
Digestive Disorders
• A. Ulcers - spot in stomach lining where cells are
destroyed, lining unprotected, irritated by
stomach acid
• B. Gastritis - swelling of stomach lining, caused
by irritating foods, alcohol, or bacteria
• C. Acid Reflux - "back washing" of acid from the
stomach into the esophagus; also called
heartburn