Human Digestive and Excretory System

When he eats, Eli chews his food carefully. As

his teeth mash and crush the food, enzymes in

his saliva break the food down into smaller

molecules. What function is carried out by his

saliva?

• It is performing peristalsis.

• It is chemically digesting the food.

• It is mechanically digesting the food.

• It is producing bile to break down fats.

What is the main function of the excretory

system?

• to remove waste from the body

• to regulate and control other body systems

• to obtain oxygen and transport it to all tissues

• to break down nutrients into smaller

  molecules

Which of the following best explains an

interaction between the digestive system and the

respiratory system?

• To use the energy in food broken down by

  the digestive system, the body needs oxygen

  obtained by the respiratory system.

• The main function of the respiratory system

  is to control, coordinate, and regulate most of

  the functions of the digestive system.

• Coordination between the respiratory and

  digestive systems is necessary because the

  digestive system obtains oxygen needed by

  the respiratory system.

• The digestive system obtains nutrients from

  the food that is eaten, and the respiratory

  system transports the nutrients to the brain

  where they are needed.

Tags

NGSS.MS-LS1-7

The digestive system obtains nutrients from

the food that is eaten, and the respiratory

system transports the nutrients to the brain

where they are needed.

• R

• S

• T

• W

Tags

NGSS.MS-LS1-3

The digestive system obtains nutrients from

the food that is eaten, and the respiratory

system transports the nutrients to the brain

where they are needed.

• Esophagus, Stomach, small intestine, large intestine

• Stomach, Esophagus, large intestine, small intestine

• small intestine, esophagus, stomach, large intestine

• esophagus, large intestine, small intestine, stomach