Twenty Questions
Subject:
Respiratory/Excretory
System
Twenty Questions
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1. Openings through which air enters
the nose

nostrils
2. The flap that closes the trachea
when swallowing

epiglottis
Tiny hairs that line the nasal cavity

cilia
4. The throat or ________ is shared by
both the digestive and respiratory
system

pharynx
5. Slippery substance that lines the
nose & trachea

mucus
6. Tubes that lead to the lungs

bronchi
7. Dome shaped muscle that aides in
breathing

diaphragm
8. Your vocal cords stretch across
your __________ or voice box.

larynx
9. Another name for your windpipe

trachea
10. The tiny air sacs in the lungs
where gases are exchanged

alveoli
11. These are the tiny blood vessels
that the alveoli are wrapped in

capillaries
12. The main function of the
respiratory system is to bring _______
to the cells and eliminate water and
____________.

Oxygen, carbon dioxide
13. Addictive substance in cigarettes

nicotine
14. It is better to breathe through your
__________

nose
15. Once the blood has been
oxygenated in the lungs it will return to
this part of the heart.

Left atrium
16. The walls of the trachea are made
up of rings of

cartilage
17. Blood carrying oxygen is said to
be.

oxygenated
18. If food enters the trachea, a
person can

choke
19. Folds of connective tissue that
produce our voice.

Vocal cords
20. Smoking can cause tar and tumors
on this organ

lungs