Digestive System

What is the digestive system?

• The body's breathing system

• The body's system of nerves

• The body's food-processing system

• The body's blood-transporting system

Digestion begins in the mouth. Which of the following statement is INCORRECT?

• The tongue aids in the digestion of the food.

• The saliva changes some of the starches in the food to sugar.

• The tongue keeps the food in place in the mouth

  while the food is being chewed.

• The digestive juices can react more easily with the food when chewed.

Where does food pass through between the mouth and the stomach?

• The gullet

• The rectum

• The small intestine

• The large intestine

Our throat divides into two separate tubes: the windpipe and the gullet. What prevents food from entering the windpipe?

• The uvula

• The tongue

• The trachea

• The epiglottis

What happens when food reaches the stomach?

• Nothing. No digestion occurs in the stomach.

• The food moves quickly into the small intestine.

• Juices mix with the food and stomach muscles squeeze it.

• The food is completely digested and is absorbed

  by tiny blood vessels in the walls of the stomach.

Where does the partly-digested food (in liquid form) go after it leaves the stomach?

• The gullet

• The appendix

• The small intestine

• The large intestine

How does digested food finally reach the bloodstream?

• It passes through the gullet into the blood.

• It is absorbed into the blood through blood vessels.

• It is absorbed into the blood through the walls of the lungs.

• It passes from the small intestine into the large

  intestine, then into the blood.

The digestive system processes food into usable and unusable materials. The usable materials are sent to the body's cells as food. What happens to unusable materials?

• It goes into the pancreas to await disposal.

• It goes to the right ventricle to await disposal.

• It goes into the large intestine to await disposal.

• It goes into the small intestine to await disposal.

Solid waste leaves the body through the rectum then the anus. Liquid waste leaves the body after passing through the ...

• kidneys and bladder

• blood vessels and lungs

• large intestine and bowel

• small intestine and large intestine

Digestion takes place in a long tube-like canal called the alimentary canal, or the digestive tract. Food travels through these organs in the following order:

• Mouth, gullet, stomach, small intestine,

  large intestine and rectum

• Mouth, esophagus, stomach, large intestine,

  small intestine and rectum

• Mouth, stomach, esophagus, small intestine,

  large intestine and rectum

• Mouth, stomach, gullet, small intestine,

  large intestine and rectum