Respiratory Organs
Which organ is the main pathway for air to enter the body and contains tiny hairs to filter dust?
Nose
Which gas do we absorb into our blood when we inhale?
Oxygen
What dome-shaped muscle under the lungs contracts when you breathe in?
Diaphragm
Is breathing a physical process or a chemical process?
It is a physical (mechanical) process.
What sticky substance inside your nose traps dirt and bacteria?
Mucus
What is the long tube reinforced with cartilage rings that carries air down to the lungs?
Trachea (Windpipe)
Which waste gas do we release from our body when we exhale?
Carbon Dioxide
What muscles located between your ribs help move the chest up and out during inhalation?
Intercostal muscles
Where does cellular respiration take place in the body?
inside cells (in mitochondria).
Which lung is slightly smaller to make room for the heart?
Left lung.
Which organ is also known as the "voice box" and allows us to speak?
Larynx
What are the tiny air sacs in the lungs where gas exchange happens called?
Alveoli
Does the diaphragm move downwards or upwards when you inhale?
It moves downwards (it contracts and flattens).
What simple sugar reactant is needed along with oxygen for cellular respiration?
Glucose
What involuntary action happens when your diaphragm suddenly contracts and air rushes in?
Hiccup
What are the two large branches that divide from the trachea into each lung?
Bronchi
Why do alveoli have very thin walls?
To make gas exchange/diffusion faster and easier.
What happens to the volume inside your chest when you inhale?
The volume increases (gets bigger).
What main product does the cell produce during cellular respiration?
Energy (ATP)
What harmful habit damages the cilia and tars the alveoli in lungs?
Smoking
What are the two main sponge-like organs where gas exchange takes place?
Lungs
What small blood vessels surround the alveoli to absorb oxygen?
Capillaries
Why does air enter your lungs when you breathe in?
Because the pressure inside the chest drops lower than the outside air pressure.
State the basic word equation for aerobic cellular respiration.
Glucose + Oxygen = Carbon Dioxide+ Water + Energy
What common respiratory illness causes the airways/bronchioles to narrow, making it hard to breathe?
Asthma