What is another name for the voice-box?

What keeps the windpipe open?

What are the tiny air-sacs where gas exchange takes place?

The way gases move between the capillaries and alveoli is called...?

What is the muscle under the lungs called?

Breathing rate is controlled by the concentration of ................... dissolved in blood?

The ribs move up and out while the diaphragm contracts. This active action causes.............?

The percentage of oxygen in exhaled air for a person at rest is

Which contains the greater percentage of water vapour – inhaled air or exhaled air?

It is where the air enters and filters

it is known as wind pipe.

Contains little hairs that help filter the air you breathe in, blocking dirt and dust from getting into your lungs.

Connects the mouth to the trachea.

The branches of the trachea which take air into and

out of the lungs.

What is the main function of the respiratory system?

When you breathe, your lungs take in ____ and release _____.

The lungs are found in the

Air sacs are the place where exchange of gases takes place.

When we breathe in, our lungs get

When we breathe out, our diaphragm becomes

The process of movement of air into and out of the lungs is called

Oxygen entering the bloodstream and Carbon dioxide entering the alveolus is called:

The breathing rate increases after:

During inhalation, the ribs move:

During inhalation, air pressure in the chest cavity:

An example of a breathing disorder is:

Cause of asthma:

The hairs that line the nose that trap dust and micro-organisms are called what?

During exhalation the volume of the thorax ...

On average how many breaths per minute does an average adult take?