Page 21 - SAAT BIOLOGY PART 2

SAAT BIOLOGY MR.MOHAMED ELGAYAR MRPROF.NET

• STOMACH: The environment in the stomach is very

acidic because of the presence of HCl, Protein digestion

occurs in the stomach by the action of pepsin enzyme

• Notice: The acidic environment in the stomach is

essential for the work of the enzyme pepsin.

• SMALL INTESTINES: most of nutrients from food are

absorbed from the small intestine into the bloodstream

through villi

• CHYME: A semiliquid form of remaining digested food.

• Digestive System

▪ PERISTALSIS:

Rhythmic wavelike muscular contractions that move food

throughout the digestive tract.

• NUTRITION: A process by which a person takes in and

uses food.

• NUTRIENTS: Carbohydrates, fats, proteins, vitamins, and

minerals.

MRPROF.NET MR.MOHAMED ELGAYAR MRPROF.NET@GMAIL.COM