BJU Science 5 Respiratory System

Match.

• capillaries

• tiny blood vessels surrounding the alveoli

• pharynx

• also called the windpipe

• trachea

• also called the voice box

• larynx

• tiny air sacs in the lungs

• alveoli

• also called the throat

tiny hairlike structures that line the nasal passages as well as most of the respiratory system

• cilia

• bronchi

• capillaries

• alveoli

two tubes that branch off from the trachea are called __________.

• capillaries

• epiglottis

• bronchi

• tronchi

Label the parts.

e

f

g

h

d

c

b

a

mouth

trachea

bronchi

pharynx

nose

larynx

epiglottis

lungs

Which part of the respiratory system is a strong, curved muscle attached below the lungs to the lower ribs and backbone?

• the alveoli

• the diaphragm

• the cilia

• the epiglottis

Which part of the respiratory system is the flap of tissue that covers the trachea when a person swallows?

• the epiglottis

• the larynx

• the diaphragm

• the vocal cords

Which parts of the respiratory system are saclike organs that replace the carbon dioxide in your blood with oxygen?

• the cilia

• the bronchioles

• the lungs

• the bronchi

Where does the exchange of oxygen and carbon dioxide take place?

• in the bronchi

• in the pharynx

• in the trachea

• in the alveoli

Which part of the body controls breathing?

• the lungs

• the brain

• the trachea

• the cilia

The pitch of a sound that you make depends on the length and _______ of your vocal cords.