Respriation

Question 1

Define respiration

Answer 1

The release of energy from food.

Question 2

What are the two advantages of inhaling through the nose.

Answer 2

1Air borne bacteria are filtered (hairs).
2. Air is moistened and warmed - this allows it to diffuse into capillaries in the lungs easier.

Question 3

Pharynx

Answer 3

.Epiglottis (Flap that prevents food/water entering trachea.


• Larynx Vocal cords - produces sound by vibrations)

Question 4

Trachea

Answer 4

• Air passes through here into the bronchi.

• Rings of cartilage surround the trachea to protect by ensuring it doesn't close in on itself.

Question 5

Bronchi & Bronchioles

Answer 5

The trachea divides into the bronchi found in the lungs.

• The bronchi further divide into bronchiole (narrower).


• If a person suffers from asthma then their bronchiole are restricted.

• Asthma inhalers work by dilating (widening)
the bronchiole.

Question 6

Alveoli

Answer 6

(Air sacs)
• Function: Gas exchange
• Capillaries surround the alveoli.
• Oxygen from air enters the capillaries in exchange for carbon dioxide.