The Digestive system

____________ is the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use.

• Nutrition

• Absorption

• Digestion

• Elimination

Chemical digestion of proteins, carbohydrates, nucleic acids, and fats first takes place in the ____________________

• small intestine

• large intestine

• esophagus

• stomach

Where do the kidneys filter out waste from?

• Lungs

• blood

• intestine

• Gall bladder

What is the role of bacteria in digestion?

• to help with moving nutrients from high to low concentration areas

• to digest food and produce important vitamins and amino acids

• to contain acidic fluid called gastric juice

• the remove the undigested food and other wastes from your body

The process of food moving through the esophagus and the rest of the digestive tract by waves of muscle contractions known as ______________.

• digestion

• villi

• chyme

• peristalsis

What are the fingerlike projections that cover the folds of the small intestine?

• pepsin

• large intestines

• villi

• enzymes

What is the muscular tube that connects the mouth to the stomach?

• esophagus

• salivary gland

• stomach

• small intestine