Circulatory, Respiratory, and Digestive Systems

Our lungs ...

• breathe in oxygen and breathe out carbon dioxide.

• breathe in carbo.

• breathe in helium and breathe out oxygen.

• breathe in oxygen and breathe out helium.

What is another word for your windpipe?

• esophagus

• sinuses

• trachea

• alveoli

Your _______ is a muscle connected to the bottom of your lungs that helps your lungs expand and contract when you breathe.

• esophagus

• alveoli

• trachea

• diaphragm

The breakdown of food into small molecules, which are then absorbed into the body is the main function of which body system.

• integumentary system

• digestive system

• excretory system

• endocrine system

This human body system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.

• nervous system

• integumentary system

• respiratory system

• excretory system

This system functions to transport blood and oxygen from the lungs to the various tissues of the body.

• nervous system

• circulatory system

• endocrine system

• integumentary system

The main function of the circulatory system is to -

• support and protect delicate organs such as the brain, lungs, and hear

• protect the body against invading organisms and infectious diseases

• pump oxygen and nutrients through the blood to every part of the body

• coordinate all actions and reactions of the body using electrical signals

Which body system is shown here?

• circulatory system

• respiratory system

Which organ squeezes and mixes your food into a mushy liquid?

• mouth

• stomach

• large intestine

• small intestine

Arteries

• Circulatory System

• Digestive System

• Respiratory System