Respiratory System Worksheet

Respiratory System Worksheet


Q2. List the structures in the order in which air passes them as it travels from the nose to the lungs.

1. Pharynx
2. Trachea
3. Bronchi
4. Bronchioles
5. Alveoli

Q3. Which is the odd one out?

Nasal Cavity


Q4. How are dust particles that enter the respiratory system in the air expelled?

Via the nasal cavities where the immune system starts to work o keep out bacteria. Dust particles also sometimes cling on to hairs called cilia.


Q5. Add the correct terms from the list below to the following descriptions


a) Smallest respiratory passageways (Bronchioles)
b)Separates mouth from the nose (Palate)
c)Windpipe (Trachea)
d)where gas exchange takes places (Alveoli)
e)Stops food "going the wrong way" i.e. choking during swallowing (Epiglottis)
f) Both air and food pass through this (Pharynx)
g) The movement of air out of the lungs (Expiration)
h) The main muscle involved in inspiration (Diaphragm)
i) Membranes that cover the lungs and line the pleural cavity (Pleura)
j) The volume of air inhaled or exhaled at each normal breath (Tidal Volume)





Q6. Arrange these statements in the right order to describe inspiration.



The muscles between the ribs contract to move ribs cranially and laterally. The diaphragm contracts and flattens. The lungs expand to fill the space created. The air pressure in the air tight pleural cavities decreases. Air is drawn down the trachea into the lungs.




Q7. True or false? Circle the correct answer

a) The pericardium is the membrane surrounding the lungs.(True)
b) The tidal volume describes the maximum amount of air that can be inhaled into the lungs (False, it is inhaled and expired)
c) The epiglottis closes off the larynx during swallowing (False)
d)When an animal exercises the rate of breathing increases because the carbon dioxide in the blood increases.(True)
e)Carbon Dioxide in the blood is mainly carried in the blood plasma (True)
f)Oxygen moves from the alveoli into the capillaries by the process of osmosis(False, The gas diffuses)
g)Expired air contains about 16% of oxygen.(True)



Q8. Add the following labels to the diagram of a section cut across lung alveoli shown below.