Structures of the System
What organ is protected by the rib cage and is responsible for gas exchange?
Lungs
What two gases are exchanged in the alveoli?
Oxygen & Carbon dioxide
What is the normal body temperature in °C?
37°C
Name one disease that affects the lungs
Asthma, pneumonia, TB, lung cancer, bronchitis, COPD, common cold, COVID-19, cystic fibrosis, flu (influenza)
Breathing and respiration mean the same thing.
False
What muscle below the lungs helps with breathing?
Diaphragm
What is the main waste gas removed by the breathing system?
Carbon dioxide
How many lungs do we have?
Name one activity that is not good for lung health.
smoking tobacco, exposure to secondhand smoke, environments with poor air quality, exposure to occupational dusts and chemicals (like asbestos and coal dust)
The trachea is also called the windpipe.
True
What tiny air sacs in the lungs exchange gases with the blood?
Alveoli
When you inhale, does the diaphragm contract or relax?
Contract
How many bronchi (plural of bronchus) do we have?
Two
Explain why the left lung is smaller than the right
To make space for the heart
Oxygen moves from the alveoli into the blood by diffusion.
True
What tube connects the nose/mouth to the lungs?
Trachea
What is inhaled air high in?
Oxygen
What’s faster?
a) Oxygen diffusing into your blood
b) Carbon dioxide diffusing out of your blood into the alveoli
c) Chris Forde
Science says (a) & (b) are lightning fast… but the parish says (c)
What is considered a normal heart rate (in bpm)?
60 - 100 bpm
The diaphragm relaxes during inhalation.
False - it contracts
Name two parts of the breathing system that filter or clean air before it reaches the lungs.
Nose hairs, mucus, cilia
What is the role of haemoglobin in breathing?
Carries oxygen in red blood cells
How many breaths do you take in about 5 minutes at rest?
67
How does regular exercise improve breathing health?
Strengthens muscles, increases lung capacity, efficiency of gas exchange.
Gas exchange happens in the bronchi.
False - in the alveoli