Respiratory and Circulatory Systems Review

When inhaling air, the lungs absorb oxygen and remove...

• nitrogen

• carbon dioxide

• helium

• hydrogen

Which organs are part of the respiratory system?

• lungs

• trachea

• diaphragm

• all of the above

The _______ help moisten and warm air, are lined with mucus that traps bacteria and dust, and are a place for the sounds we make to vibrate.

• sinuses

• heart

• diaphragm

• lungs

When you swallow food, the _______, a flap inside the throat, covers the windpipe to protect it from taking in food.

• lungs

• trachea

• pharynx

• epiglottis

The_________ is a tube that carries the air we breathe down toward the lungs, and is also called the windpipe. It is lined with tiny hairs, called cilia, that move debris-trapping mucus upward toward the nose.

• esophagus

• trachea

• diaphragm

• lungs

When you inhale air into the lungs, oxygen passes through the cell membranes of the _______ microscopic air sacs contained in the lungs.

• lungs

• diaphragm

• alveoli

• bronchi

This system is made of the heart, blood vessels, and blood. The function of this system is to transport materials around the body.

• circulatory

• respiratory

• digestive

• nervous

_______ are microscopic blood vessels that surround alveoli, collecting oxygen and releasing carbon dioxide, line the small intestines, absorbing nutrients and molecules from digested food, and reach every cell in the body.

• veins

• arteries

• capillaries

• heart

Blood is a made up of which of the following?

• red blood cells

• white blood cells

• plasma

• all of the above

Oxygen and carbon dioxide gas dissolved in the blood are transported attached to _______

• platelets

• hemoglobin

• red blood cells

• white blood cells