8U4C4:

the tube that connects the larynx to the lungs

• bronchioles

• trachea

• bronchi

• pharynx

A tiny blood vessel that allows an exchange between blood and cells in other tissue

• capillary

• circulatory system

• breathing

• respiratory system

A collection of organs whose primary function is to take in oxygen and expel carbon dioxide.

• respiratory system

• circulatory system

• alveoli

• respiration

Any of the tiny air sacs of the lungs where oxygen and carbon dioxide are exchanged

• trachea

• epiglottis

• alveoli

• respiration

The passage from the mouth to the larynx and esophagus

• trachea

• bronchioles

• pharynx

• respiration

A vessel that carries blood to the heart

• artery

• bronchi

• vein

• capillary

a collection of organs that transport blood throughout the body

• circulatory system

• breathing

• respiratory system

• capillary

two tubes that connect the lungs with the trachea

• trachea

• bronchi

• alveoli

• vein

A flap of tissue that seals off the windpipe and prevents food from entering.

• trachea

• bronchioles

• alveoli

• epiglottis

A blood vessel that carries blood away from the heart to the body's organs

• trachea

• bronchi

• vein

• artery